Ooooooh boy, @Steve Goldberg. Brace yourself....
As someone who works in SMT quite a bit, I have few:
1. Not being able to be logged into the SMT and the NetSuite backend at the same time infuriates me on a daily basis. I used to be able to, but something changed in the last few years and I'm constantly being logged out of either when trying to work. I know it's probably a security thing and probably for my own good, but man does it make my blood boil every time...
2. My UX and SEO teams like to complain at me about the layout shift that happens when SMT content is loaded in. If you've got an entire landing page built in the SMT, your entire layout is going to have a massive shift and kill your LCP score. And if I've got a global banner that I need to put on every page, every page is getting shifted on load. I realize it can be mitigated somewhat by pre-sizing the placeholder that the content gets loaded into, but that becomes next to impossible when dealing with something like text content on multiple screen sizes.
3. The built-in CMS Text content type drives me nuts:
a. It strips out almost all inline HTML that you try to put in it. Consequently, inline styling cannot be added to anything. It will show up in the preview but it stripped out on save. Any time I need to add a custom color to a heading or a margin to an list element, I have to create it as an HTML type. Not ideal if someone other than me needs to touch it later.
b. The target attribute of a link defaults to "_blank" and cannot be changed. What???
4. This one is developer-specific, but there doesn't seem to be any way to execute JavaScript upon completion of the load of SMT content, either in a custom content type or by adding JavaScript in an CMS HTML content type. It would be great if I could have a CMSContentLoaded event that I could listen to and execution actions on in my custom content types, especially for things like scroll events or positioning that requires all the content to be in place before they can execute effectively.
5. Browser parameters don't seem to be accounted for in the Path Context of the CMS Contents record. Instead of creating a complex customization or extension to display information that's specific to a certain matrix combination on the PDP or certain filter criteria on a PLP, I would love to be able to use the SMT to add content that is specific to that URL string. (I realize that gets complicated, but it's on my wish list for sure)
6. There's not a great way to display the same content in multiple areas of the site. If I want to display the same banner on multiple pages (individual pages that might not share the same page type), it seems like I would have to create multiple records of the same content. I've since figured out how to do it by manually editing the CMS Contents record, but it would be a nice to have out of the box.
7. I would love to be able to schedule a change to an individual piece of content rather than scheduling the visibility of the content as a whole. For instance, if I run a sale banner on the site and I want to update the banner to say something like "Only XX hours left", at a certain time, I either have to make the change and publish at that time or create a whole separate banner with a visibility that starts at that time (and ends the current sale banner). Again, this probably gets complicated, though...
8. I would love to use a saved search in order to create a commerce category. So if I have a promotion that uses a saved search as the criteria, I could just use that saved search to create a commerce category (and have it stay updated) instead of creating a whole new commerce category of promotion-eligible items manually.
9. On the Pages view of the Overview tab, I'm constantly getting "Preview" and "Edit" confused. If I want to edit the content of the page, I have to click "Preview" but if I want to edit the page settings (title, visibility, etc), I have to click "Edit". It seems like those could be named better. And there's no way to switch back and forth between editing the page content and editing the page settings once you're in either view.
10. The animations when navigating through screens in the SMT seem unnecessary and memory-intensive. The SMT in general seems pretty resource intensive. I've since updated my hardware, but any time I would work in the SMT on my old machine, it would sound like a jet engine.
11. Not once has the "Visibility Timeline" feature made sense to me...
I'm sure some of these may be the result of my prehistoric version of SCA and I'm sure I'll think of more, but these are the biggest quality-of-life improvements that could be made for me. Happy to discuss further if you need more information