Sorry: I was too fast! The text-tool is on the way, not file layer smart filters! But this is of interest for you anyway because text is in your request too.
This is known and on its way, but will need time to be completely implemented because of the small team of not even ten developers. Currently, @wolthera is the only developer working on it, and she is doing a great job, from what I’ve seen so far! Maybe you want to take a look at the current state of the upcoming changes?
A forum-search, with help of the magnifying glass icon you’ll find in the top-bar of the forum, for “text tool” and other useful search-terms may reveal more information on this for you.
But, if you want to eschew Photoshop as much as possible, maybe you give Inkscape a try to create textual content the way you like it to be? It may not allow anything what you could achieve with Photoshop, but it is far more capable than Krita’s text-tool in its current state.
Michelist