That's just your own personal preference.I think they're fine.Which is why Thunderbird, Gambit and Bishop are horrible codenames. Its like calling Scott Summers "Brood" or Hank McCoy "Verbose"
Gambit is a con-artist.
Bishop is the last line of defence.
There still lame because they say nothing about the powers or abilities of the characters.
The dude charges objects with energy and throws them.
bishop
Chess . one of two pieces of the same color that may be moved any unobstructed distance diagonally, one on white squares and the other on black.
Great name for a teleporter, not so much for a guy who can absorb and redirect energy.
bishop's actually his NAME. it's Lucas Bishop. no different to Alpine in GI Joe being Albert Pine.
Not a fan of superheroes using their real names.
That pretty lame too, no doubt he's a mountaineer.
There isn't anything saying everyone has to be given a codename based on their ability.
So Namor being Namor all thses years is lame, huh?