Sometimes it's actually really annoying having allies in combat because they just end up stealing the exp for your kills, it'd be nice if this didn't happen.
I mean there might be an argument that this would be an exploit in the case of hacked turrets or whatever, as that's an optional thing, but fights like the eels/scrapper quest where you're forced to have allies can be frustrating.
... Actually now that I think about it I would really like an option to take on the entire enemy base all by yourself actually.
It'd be fun as heck! Plus it's an opportunity for fun dialogue. I remember the first quest in Stalker SoC had an option to take on all the enemies in an abandoned car mechanic's yourself and I've always taken it whenever I played. One man army kinda situations are fun as hell.