Who else is going to see Rogue One, the next Star Wars movie soon?

[Amarok]

as for the milking true but your setting needs a sense history and like it or not the original characters even in universe big players in it but yeah I like the fact there expanding which Is why despite all it's occasional weirdness I liked the EU

Are they though? The Republic was around for like 20,000 years, the Empire lasted what, 25-30 years max? And then they got their ass handed to them. They're really not a big deal on the scale of the setting.
Soldiers can't shoot straight, all their ground vehicles have long goofy legs and are easily toppled with the application of some rope, their doomsday weapons keep blowing up, and they were somehow defeated in battle by a vastly technologically inferior enemy - like stone age era.

Yes in terms of time scale but talking about in scale influence long after died it's influence on the galaxy was huge .I.mperial outpost were used by the new republic as well as imperial ship designs. Huge leaps in technology were developed by the empire especially starship tech. And tons of new hyper space lanes were discovered

As for stormtroopers one common mistake people make is that in most of the firefights in the OT the stormtroopers were ordered to miss. they were corralling not killing. As is countered by the death of the jawas in a new hope if they were trying the team trying to rescue leia would be dead hundred times over.

As for AT ST walkers it's infact really hard to take one down the snowspeeders  in ESB used cables normally used to direct massive cargo ships in planetary atmospheres so there built to take massive strain 

Depending on canon in legends the only reason luke was able to blow up the death star one was because he used the force to direct the torpedo. Otherwise it would have been impossible. As for the second death star it was blown up because it wasn't finished and was never really intended to be it was just bait to lure the rebels into a conventional battle.

As for the defeat on the moon of endor it's because ewoks are ungodly killing machines with the wookie level strength and horrendous savagery and highly cannibalistic tendencies.(take a guess what happened to all the imperial prisoners after the battle) They also had home advantage and took the imperials by surprise.