....sometimes me wonder if I am starting to stuff too many mods into a single game instance...
Nah, "too many mods" is not really a thing. If the game boots up and doesn't crash, you should feel free to add any mod that looks or sounds neat.
There was a time (back when we were still playing just in corvus) when it was common for me to play with literally every released mod on the entire forum active all at once (plus plenty of my own hackjob modifications). It was ... "lively", let's call it that, but entirely playable and fun.
Most current-day mods tend to be a lot more stable (both in terms of not crashing the game or creating bugs, and in terms of game balance being close-ish to each other and to vanilla content) and since the new content from them is going to be spread out over many systems you won't feel as overcrowded either.