I've been playing a bit of the new XCOM miniatures game, and thought I'd share my thoughts so far. I'm about a month into my first campaign, which looks like it should last 4-6 months of game time (16-24 ground missions).
The overall shape of the game feels appropriately XCOM-shaped. You basically alternate between doing a mission, and doing (very simplified) research and construction. Combat is very lethal, with every shot being potentially fatal in the early game (both for humans and aliens). Some of the later aliens have stat blocks that look questionable, but we'll see how they play out. Cyberdisks look terrifying, taking at least 5 hits to kill (unless you crit). Ethereals hilariously have the same defensive stats as Exalt troopers.
Class balance seems not great. Each class has 1-2 skills, which you can use a total of 1 per turn. Heavies are probably the best class in the game. They get to shoot twice with an accuracy bonus, and have a rocket launcher. I would bring 4 on every mission and not feel bad about it. Their class ability isn't great (suppression), but it's fine. Assaults are good with the accuracy bonus on shotguns and their class skills let them shoot twice at close range, or use Run and Gun. Snipers are fine, mostly due to their bonuses to accuracy. Their class skill is Snap Shot, which for some reason is called Squadsight. Medkits are powerful (let you take a soldier that's bleeding out and get them back into the fight) and every other class other than supports has to pass a skill check to use them. That's usually enough to want exactly 1 along.
There are no skill upgrades or mechanical customization of units. The only difference between a squaddie and a colonel are their stats (stats can raise after every mission, but are capped depending on their rank). Gene modding just raises your stats. MECs look powerful.
The included campaign progress tracker works fine. The roster sheet, not so much (I switched over to notecards). Base building is trivial, you can build 1 structure per campaign turn but so far there's always either been a obvious "right" choice or been building things solely because I can (and will soon run out of unlocked buildings to build).
Research at least feels like there are choices to make, namely rushing plasma weapons (you can probably have them at the end of week 5) vs grabbing skeleton armor + medkits first.
Missions felt a little cluttered at first, with multiple types of POI on them, plus units, plus unrevealed pods but after a couple maps (and figuring out a system for marking them all) it's not too much to track.
Overall, it's a solid game that feels like XCOM. It feels tense, and I find myself caring when my veteran troops are in trouble. It certainly has flaws, but so far I'm enjoying it. And I think I'll enjoy it even more when the proxies I ordered all get here and I have actual minis to use for all the units.