Has it ever been considered to make command centers *all* come with functionality as though they contain a built-in science lab? And also to make the "s" key a global key, solely for getting the "spend knowledge" menu (not about selecting labs)?
Too often, I lose my only science lab due to an AI attack, and have to go manually build it again (and I usually set it to auto-gather knowledge). If they left remains this would be a slight improvement, but I think still annoying because I they probably wouldn't remember the auto-gather knowledge orders from before the unit was destroyed.
Also too often, I decide to spend some knowledge, and have to go hunt for the planet where my lab is so I can hit the "s" key and get the menu to tech up. In fact, I wish you could hit the "s" key to get the tech up menu even on hostile planets. Sometimes it'd be nice to look at available techs and their costs while I'm monitoring an assault.
It's also simpler to teach a newb "to tech up, you hit s", rather than "if there's a science lab here hit s, if not hit tab, set filter for science labs to find where your lab went, and if they are all destroyed build a new one on one of your planets and then when it's done, go there and hit s"
Edit: striking out the 2nd scenario, because the lower-left bar makes finding a science lab pretty easy. I stand by the first suggestion.