Been playing this.
I quite like its basics, the way it plays (would love a Warhammer 40K game with the same gameplay).
Though two little things I wouldn't mind to change would be
Being able to use the map when prone, might make the whole being harder to detect by patrols useful if you could actually see them. I also find it a bit odd you cant shot when prone.
Being able to have the map always up when in vehicles it makes no sense to me that you would have to "pull" up the map like you do on foot in a vehicle.
Plenty of weapons and strategems to use though even still I do find myself generally sticking with what works for me. Quite like the Breaker mainly cause accuracy isn't too important

. Stategems change depending on level, objectives and faction but always have a resupply one. Usually take a turret of some sort, useful to have another thing shooting and drawing attention. The Napalm is another one I like as its good at area control, unlimited and a shortest cooldown.
Bugs: I like the bugs the most, simple to fight and arent too annoying, becomes easier to avoid alarms on the hard levels when the elite scouts that appear like to jump you rather then just sound the alarm straight away. The Impalyer is the only slightly annoying bug mainly as if you don't know its there good chance its tentacles will catch you off guard. I can see why they are the most popular to fight.
Cyborgs: My opinion on the Cyborgs changes depending on one thing, is there IFV(Tanks) in the level? I loathe the IFV because its a normal spawn, so often in later levels they will just drop out of the sky(you can see its shadow fall across the ground) or just roll up to an objectives and to make things worse they can trigger alarms. Nothing worse to creep up on a red blip only to have the IFV drop down infront of you.
Illuminate: Annoying, definitely give me the most trouble. There is just so much to watch out for when fighting them, snipers, one-hit walls, stasis, control reverse, invisible ninjas. Really should unlock the shield to guard against a some of those issues. I like the Patriot against them as its shreds them but it shows off my somewhat poor accuracy and chews ammo.
Playing it is really up and down though can be really annoying sometimes and just saps any fun from it, really feels like it can be against you succeeding at times and other times its like its cool with it. I think the best example of this would be the capture objective sometimes it will go well with little to no resistance others it puts up a fight but then other times its just feels like it refusing to give you a chance and you are devoid of any luck and the game turns into running back and forth attempting to capture this point.
One thing I hate is the Retaliatory strikes I just avoid these missions and stick to the normal mission planets. I just find these strikes far too difficult and cant even finish difficulty planet 4s with them when normal level 4 missions arent an issue in the slightest.
Also have an allergy to snow planets that's also on my avoid list.
I've only played 1-2 players and I think that number works well because of how the camera works and also because of the main tactic of running away when things get over-whelming would get harder with more players.
Overall its generally fun the 12 difficulty levels really let you find a difficulty that you are comfortable with.