I feel like we agree with one another every time we cross paths on the forums haha
I always feel like I'm in the minority about light up things, seem like I might be wrong!
I'm 10x more interested in keeping the pose I came up with than screwing it up while trying to flip 6 or 7 switches on an Iron Man armor. Especially considering it's for 5 minutes of "oh that's neat". My 43 never has had the batteries installed, and I've taken them out of all my other figures with them (even though I really liked Star Lord's). All that being said I think the light up features are more a thing for photographers than display. And I guess that's fair.
If you asked me, I would rather see HT work on developing/integrating reflective or light catching materials so things can flow or shimmer without the need for batteries.