End of the day, mod pack makers are sharing a game vision. You'll either like it or hate it (like marmite). Exactly the same as mod makers.
As a player, your goal is to find the vision that you agree with or want to try, and NOT spout off about the stuff you hate trying to rouse a rabble to burn said pack to ashes. A lot of work and testing goes into compiling a themed modpack.
I feel some player are stuck in the 1.2.5 era and expect 1.6+ packs to be basically the same. Digital Evolution is fast, nothing will be the same. Time to try new things, and see what survives, and what fails, and as a result of both, see what new mods might develop.
Also, I personally feel that FTB needs to get back to roots and unleash a new Beast monument to be fed. That was the signature map/pack of FTB, long before any other pack. I know that's not an easy thing to do, what with all the logic, testing, etc, etc.