Pretty sure it would eliminate most of the situations where you get shot from behind which are pretty much the most frustrating part about the mode. The chaotic nature of DM at the moment doesn't even make it that good of a practice tool since it encourages camping and holding power positions just to stay alive. Playing with a team also helps practice map control, trading, and general teamwork as well, which is what makes escalation so popular as well imo. CSGO has TDM which i think plays infinitely better as both a practice tool and just as a "for fun" mode, when Valorant's DM has a ton of camping sweatlords.

Having the option to choose between both FFA and TDM would be ideal, but I think having TDM be the only option would be far better than what we have now.