This is hard to notice when 90% of the games are between 4 man premades with a combined 10k hours and level 1-10 noobs who have literally just bought the game 2 weeks ago, BUT: I noticed that on the rare occasions that two somewhat comparable teams fight, the game is basically decided by who is put up against more shielded enemies. They also spawn in clusters, so it’s an all or nothing thing, either ridiculous shield spam or barely if any shields at all. One team gets to fight 5 maulers and a bunch of raiders. The other team at the same spot has to fight 3 rotshields and half a dozen shielded clanrats. Rotshields are especially brutal because they take forever to kill or require using an ult, and can be used as meatshields by the skaven team. In tight spaces, such as the start of round 2 on Righteous Stand, a horde or ambient mobs counting an abnormally high number of shielded enemies, or even just a stray rotshield that is well-utlized by the skaven team, is a GG. Then in the next round, for the other team, nothing spawns but soft trash that can be cleaved through for free THP.
The distrubtion of shielded enemies needs special attention and made even for both teams. While it might not look important now, while everyone is either queuing up with premades pwning noobs 400 to 0, or queing solo and watching a 30 minutes long cutscene of dying over and over again, on the off chance that Versus mode will ever get some semblance of balanced matchmaking, the issue will become a lot more prevalent.