My opinions/thoughts of the new tagging system:
1. Currently targeted doesn't seem worth replacing with tags (except for snipers... I'll get to that). Unless the tick system is ridiculously fast, as long as we can't set a target the same tick as we start aiming, it won't be better setting up a currently targeted over just simply attacking first and asking questions later. It eventually becomes a waste of time and makes for AIs that are laggier than the opponent (that said, I'm still not totally against tagging being forced to the tick system to punish over use, it's just that currently, normal use is punished as well)
2. The game rewards not switching targets (with 1000 ms of aiming for even assaults and shotguns, and a whopping 300 ms for sniper aiming). Currently targeted allowed for that to be easily achievable, and was a blessing for snipers who are basically useless without any method to keep them focused. However tagging does the opposite in many cases. Tagging punishes you for trying to keep track of your target (now, I will say that 4 ticks per second makes the punishment not too harsh, but that's basically what it still is). Thus, the only real you should keep track of a target is because snipers have no choice but to have some method of doing this.
3.Tagging is easier to explain than currently targeted, I'll give gfx that. But explaining the uses is SO MUCH HARDER. Thus, if you were to think of points as money, trying to find good uses of tagging just makes "the rich get richer". Not very new player friendly imo,unless that player likes real complex games (although that's what gfx could be going for, idk).
4. I tested in 6.1.2 on the clone apk before 6.1.3 went public, and I can say, setting states on your bots is useful, but can they still are slower than not setting the states in the first place. Setting a state before the battle begins?: Alright, fine , the enemy is lagging as well to set their first attack target. Need to set a state to make sure you checked another state?: You already lost. Changing a state mid-battle?: Fine, but you better make sure you can quickly get back to fighting. Are they useful? Sure, but they come at a cost and I'm not sure that price is worth it (but someone else might prove me wrong). The only maps I saw improvement by using states over not using states was almost always because either the maps started the enemy out of range, or because the lag actually helped for better positioning when attacking (and even then, I was just able to test assaults only vs bots that were still made by me, so it might of even then not been optimal).
5. 6.1 is Actually 6.0, 6.0 is actually 5.4. Just think of how different it was to get used to bot classes. Just give it some time before saying whether people is dropping the game or not. (That said, I do think tags still need some more, because their form is the the best with these current bots)
All in all, I don't like the tagging system as much as currently targeted and I think it is much more limited (despite the fact fact that it was supposed to have more options), but at the same time, this change is so major, that I'm not sure if it is even possible to say much on it.