If one person is allowed to use something, everyone should be.
Further, I believe that parties lacking a certain "role" or oversubscribed to one are probably going to be more fun (at least to DM for, since you can keep throwing up the things they can't do and laugh at them if you really want) and typically don't even think about party composition if I can help it when selecting from apps.
Also, "time to ask" is not really a lot of time, it's like this:
"Hey dude, can I use the Super-Razor-Warrior from Lords of Weirdness?"
"Sure"
"Great!"