he has only 11.7 T80UM2 and got uptiered, now he has access to a pantsir that is above his only vehicle because the vehicles given are based on both the vehicles BR brought and the BR range of the match. So in a way you definitely do get access to vehicles that are above the players own vehicle.

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The free vehicles are basically worthless for every other nation that isnt russia. With USA and China being just barely worth it.
Assuming you brought top top tier plane (or got uptiered from 11.7-12.0) and lets say a light tank you will get a tank with lvl 1 crew and stock modifications, even if you own that vehicle and fully spaded it.
This generally means your tank thats given to you is horrible to drive because driving is 0, horrible to aim because targetting is 0 (so you dont even get the horizontal and vertical aiming at the same time), one FPE, no thermals or LR and armed with only HEATFS which at top tier is even worse to use than straight up HE shells.
The MBTs are simply just not worth it because you are artificially getting cucked by the crew and lack of modifications.
As for SPAAs, again, Russia gets Pantsir and China CSSA5 for free which is pretty busted while other nations get jack shit. USA atleast gets ADATS that you can use as a TD.
Israel is just sad because their next best SPAA that isnt spyder is a chaparral and since its stock it doesnt even get the better missiles, it uses the MIM72E which can get flared. Germany gets Flarakrad but without smokes so again, worthless and as Japan i get beautiful and absolutely worthless TanSamKai with schizo radar.
Then you get into games and its so abysmally annoying, since SPAA cost is lower than MBTs, even if you end up killing a dude like 1-4 times hes just gonna bring an SPAA. This would be fine, however when theres 6 Pantsirs at all time, its just bothersome. Most of these people are also not good at playing SPAA or have never played top tier SPAA before so they end up just being at most an obnoxious speed bumb for CAS in essence. Like for example here:
And with the availability of pantsir to everyone, most of my matches at 12.7-13.0 are literally just quarter of my team spawns SPAA and is masturbating in the spawn while im trying to do LITERALLY ANYTHING.
It helps noone, just makes the matches worse for everyone.
It makes it worse for ground players because now theres 7 more SPAAs that could have been tanks with these free SPAAs not even moving out of spawn or positioning properly.
It makes it worse for planes or helis because while its not hard to kill them its just obnoxious to spend 5 minutes trimming the fat down instead of helping the team, plus while you can dodge pantsir missiles pretty easily, if youre using stuff like F2A (like i am at this moment) having access to only JDAMs means i have to actively hunt down ever single SPAA because they will just intercept my stuff since even a blind man can intercept a glide bomb, which is more of an annoyance than a threat.
And again, this is only with russia/china on the enemy team thanks to that PESA/TWS radar. Against other nations the chances that they will intercept stuff are much lower.
Also lastly it doesnt even help the SPAA players. The competency of people using the free-SPAA spawns is like, below 0 but what they do is they alert every single plane to start evading early which when im in a tan sam (or the kai version with radar down to be more sneaky) with limited range doesnt help me one bit when the plane starts evading before reaching my effective range.
Stop flagging shit you dont agree with, genuinely worse than reddit.