I must admit to not being able to memorize all of Sublime Text's shortcuts, and menus now look like this:
There are a very few shortcuts which do appear, though.
This happens on both 10.13.6 and 10.14.1 with builds as above; does not happen with build 3176.
I noticed that with the About Sublime Text window in front that in build 3176, a lot of unavailable menu items are enabled, but this is largely fixed in build 3182, although still-enabled keyboard equivalents (like ⌘W for Close) still disappear with About Sublime Text in front. Perhaps this fix broke keyboard equivalent display elsewhere?
Overall, I've never seen another Mac app where keyboard equivalents disappear for disabled menu items; if possible, I'd recommend these two not be linked.