TRYN is great, don't get me wrong. But let me put this another way.
Most people would agree (not me) on the following.
Tryn > Olaf
Ziggs > Lux
Gangplank > Miss Fortune
O.k. NOW, think about a team fight with side one have all the "OP" champs and side 2 the "also rans"...
Side 2 wins everytime if evenly equipped and assuming good play on both sides. Olaf Supports and Tanks better for MF and LUX and MF and LUX support Olaf better than GP and Ziggs Support Tryn. Olaf can kill just as quick as Tryn, maybe quicker. EVEN IF OLAF dies before he gets a kill (or two) Lux can finish the job getting at least one maybe two and LUX and MF can retreat with CCs. So at best the "OP" team gets an even 1 to 1 but I think it more likely the OP teams winds up 1 and 3, 0 and 2 or 0 and 3.
So now trade Gangplank for MF and Ziggs for Lux. The team with OLAF STILL WINS.
Maybe TRYN has a little more damage output than Olaf after they reach their ideal builds, but I'd stand behind a good TT Olaf player with any AP ranged much longer than I would a similarly skilled Tryn player.