Looking at /GO, it really ends up feeling that Nasu in a way limited himself way too much with ME back in /SN. To be fair it's not like he has Clairvoyance EX to see how much Fate ends up being, but it's really feel hilarious how much of new berserkers in /GO that aren't from release are either having a low enough level of ME to have coherent speech (Beowulf and Kintoki), EX ME and made to be legitimately batshit in some way (Cu Alter effectively, Raikou, and even as release servant, Kiyo, Vlad, and maybe Gilles counts), or just end up not really bothering with the speech or thought impediment much (Ibaraki, and to lesser degree Tamamo Cat).
Then again, even the release /GO original berserkers that hasn't been mentioned (Caligula, Asterios, Eric, and maybe Darius, but I think that guy actually doesn't talk) have limited capabilities to talk anyway. And bar Asterios, they ended up not being popular anyway (rarity, meme material, and the fact they're guys instead of waifu aside.)
Stars and rarity in Go are literally waifu stats.