Got the game yesterday so i dont know the differences with previous builds BB5 is the only one i tried.
Being an XCOM LW veteran i found combat fairly easy, in normal difficulty, at least compared with LW where i had my arse served back on a platter many times in the first two game weeks even if i finished vanilla game at highest difficulty.
Played a few missions; some very easy but the last one where i first met tritons was really fun; luckily i had a guy with a grenade launcher, i cleared flat the building where the last two tritons where hidden invisible and won the mission. I’m not sure how in hell will i rebuild all the grenades i used, i’ll think about it in a bit when i finish posting and restart playing. 
I found the heavy soldier absolutely useless before i finished making the grenade launcher and gave it to him; he has a nice jetpack and can fly where he wants but he’s unable to hit an elephant from 5 meters and giving him a pistol didnt change much because half the times he forgot to load it or to remove safety and his spread, compared to the sniper’s one, is really huge so it’s not the cannon it’s the man that should be cooking pizza and not fighting aliens in a top class fightiong unit
The sniper instead is OP like it was in XCOM; after a few mission he was level 5 with a nice lot of skills, having done half the team kills, while the poor heavy was still level one. Maybe when he starts using guided missiles and plasma MGs he will become a killing machine too, but ATM it’s very hard to level him unless you give him a grenade launcher that could be used by assault troopers too BTW
There are a few things i havent understood and probably missed in the tutorial pdf:
1- I have seen an alien enter my chopper and disappear; maybe it wasnt my chopper, but it was an orange rectangle with some arrows. There was no fight when i finished the mission so i guess it wasnt but dunno what it is.
2- there are some orange skulls in the map; my educated guess was they are spawning points. I spent a few turns with my guys guarding it in OW but nothing happened
3- There are some big red tanks that seem to say: wait for an alien nearby, shoot me and KABOOM. I havent found a way to target them tho, next time i’ll try a grenade
4- I managed to recruit a few guys; now i have the base full 8/8 and there are just a couple more spots where to build so i’m a bit afraid to build another barrack because i’m sure that if i do i will soon research a tech that will allow me to build the super weapon that needs a specific room to be built and this space is used by my second barrack and second storage.
5- I finished exploring the area i was able to scan; now i have a couple nests to do, probably my next missions, then what can i do? I dont feel confortable sending the chopper outside the no return zone hoping to find another phoenix base.
Running out of gas 3000 km from my base with my squad inside my only chopper isnt the way i want to finish my campaign. Maybe inside the nest i will find the megascanner that will allow me to see further but ATM i feel a bit stuck