What are you complaining about? my first 60 was summoner. They have to maintain aetherflow, aethertrail attunement, 3 dots per enemy, and a pet. now ive switched to dragoon as my main, and here are my thoughts about these things of yours.

fang/wheeling being rng determined is one of the best things. Keeps you thinking how you need to move, and keeps the animations less repetitive.

BoTD is a timer that is EASILY maintained by anyone who actually bothers to learn mechanics and apply themselves to the fight. If you cant do those things, well then you dont deserve the buff. When it does rarely drop, a good dragoon will have it already off cooldown ready to be activated the moment the are in animation for vorpal thrust or disembowl.

GK is a powerful ability you weave into your oGCD times, WHEN you know you have the time on the timer to spare. General rule of thumb is if you have 21+ seconds of BotD when you've started your FT/CT combo you can weave in a GK.

You lose the timer because you need to actually learn how to play with the ability. The timer actually makes you work. Building stacks is ungodly boring playwise. as for the supposed "long" cooldown on BotD, the most powerful summoner abilities (Bane,Fester,Painflare) are locked behind an ability with the same cooldown that gives them 3.

TL;DR

STOP COMPLAINING ABOUT WHAT MAKES THE CLASS ACTUALLY FUN, AND GIT GUD!