I probably can’t play tomorrow so here is what I have gathered so far. Overall the game really takes me back to the H3 days, which I loved! So a very big thumbs up from my side on how the multiplayer is handled in Infinite;)
I did encounter a few things though:
Grenade pickup crash
On very rare occasions when picking up grenades, both from the spawner (happened the most) but also once from the ground, the game could freeze. Voice chat kept on working though. I had to force shut down the game and restart. I think this bug was already known BUT:
On one occasion my keybindings were set to default when restarted. This only happened to me once though.
Score breakdown
Did not work at all for me. On very rare occasions I was shown the victory pose of the team but I have NEVER seen a score breakdown after a match has ended. Always the standard “lost connection to the server” where I was then greeted with the ‘last match results’ screen.
Matchmaking
I am always kicked out of the first attempt to join a match (4/4 players found, map and mode loaded). Screen goes to that black loading screen with the 3 dots and then returns me to the main menu. ALWAYS happens at least once. Most of the time it succeeds on the second attempt. On rare occasions it takes multiple tries. Kind of felt slightly improved after the saturday update, not quite sure if I was just lucky. But still at least one retry even after the update.
Some personal things
Sound of the Needler is VERY silent (compared to other guns) when someone else is shooting it. On the receiving end sometimes it took me a while before I recognized I was being shot with a needler (purple mist as a result…)
Bots keep killing you after the match has ended. I can hear myself being killed during the black loading screen, which bugs me more than it should 
Maybe disable their AI when the match is done?
I’ve had some trouble with the zoom. I personally prefer to play with the ‘hold zoom’ option instead of the toggle. But it pulls you out of the zoom when hit. Pretty much spazzing out the zoom when you hold the button while you get hit. Is it maybe possible to also make that a settings option? To leave you zoomed in even when you take a hit?
Hopefully my feedback is of some help. In any case, good job on the multiplayer so far! Looking forward to play it when it releases 
See you all when that happens!