I like the idea of different Tricorders for everyone it'd be a cool change to the game. Also maybe add different types of Tricorders to some of the costume packages in the C-Store? After all the Bajorans use their own Tricorder, as do the Ferengi. So maybe if you purchase the Bajoran Militia outfit, or the Ferengi race addon from the C-Store it will give the option of using a unique tricorder as well. You could also add the TOS tricorder to the TOS package, the ENT ones to the ENT package and so on. Klingons definitely need their own though anything that helps make them more unique as a Faction is awesome in my book.
Also for reference here's a list of the different Tricorders from Memory Alpha:http://memory-alpha.org/wiki/Tricorder
I would like to have the Tricorder from ST:Nemesis to be able to be use in STO.