I fight against a 1-shot Lycus using Hive WAY easier than I can deal with an R&R Alicia. Again, it's her mobility that makes pvp hard to deal with. But high MMR AI will track her making it almost pointless for pve anyways, it's just a player annoyance, much like Doldren't teleport since AI knows exactly when he moves but players don't have that luxury.
As videogamedunkey wisely said: "In video games, movement is power"
This is why I could give less of a shit what guns 1-shot me, if I still have a chance to fight back. Lycus, Schleuder, snipers, doldren, etc. can all 1-shot but can still be fought against. Ginebra is the hardest of these to kill of course due to her armor and cat, one of the ultimate movement abilities in the game with hardly any limits on it, not because of her weapons. Rak is only good because of his speed buff. Alicia's guns are trash but she can bamboozle human reflexes very easily. R&R is not trash though, so mixed with one of the hardest characters to hit, and that's why she's so hard to counter.