Before that, it might be helpful to post them in a branch for anyone who
might want to take a look, to give a pre-review, so to speak.

It's available in gitlab branch https://gitlab.com/atamariya/emacs/-/tree/dev . If you want it in some other repo, can you provide me access to that repo?

Relatedly, while looking through your /compare/master...dev link, I
noticed some questionable changes, though. Like some commented-out code,
or checked in company-semantic.el (did you add some extra features to
it?), or changes to a number of files in /progmodes/ (!). These should
have to go, unless accompanied with real good justifications.

Changes to company-semantic.el will of course go into company package. It's presently in my repo for my convenience. I've added some post-completion and template changes (eg SQL).

Changes to some files (e.g. in progmodes) is the reason why I want atleast couple of more users to test the functionality. I don't want to push some changes that might have wide impact on the basis of my individual testing alone. What if some existing functionality is breaking that I'm unaware of (something that I don't use)?