It’s not the turn one damage what is the problem, it’s the fact it is basically untouchable by anything that is not immune and / or has a dodge.
Raptors? It’s faster than most (which in itself is ridiculous) and it can cleanse and slow them.
Tanks? They either get distracted or slowed back, then eat back to back rampages with no way of retaliation.
Touramoloch? It either does 50% damage or go for the full damage route, but die for doing so, while Diloracheirus still runs away.
Utarinex? Good luck doing anything to it while being distracted and stunned
Tyrant class theropods like T. Rex or Thoradolosaurus? Eat a distraction and stun then it runs away.
Spinotasuchus? It gets distracted then rampage and run over.
Magnapyrritor? Gets twoshot no matter what.
The only dinosaurs that have a CHANCE beating it are Indominus rex, Indoraptor (which Diloracheirus can kite, because it is not immune, so even that matchup is unfavorable), Momomimus (you have less than 50% to do that though) and Erlidominus. Only Erlidominus and Indominus are reliable counters and that is a grand total of 2 dinosaurs.
Trykosaurus has a way of negating what Diloracheirus does, but again, not actually beating it, because Diloracheirus can just flee from this matchup.
Also, no, I rather not get every unique and legendary buffed to the point of limiting every single other dinosaur out of competition.
This new patch already completely pushed out traditional raptors other than Utahsinraptor as well as every single non-hybrid chomper because of Tyrannolophosaurus, Thoradolosaurus, Trykosaurus and Tenontorex, as well as making Tanycolagreus not being a viable niche option, because of the Indoraptor health buff.
I am not saying that commons, rares and epics should be on-par with legendaries and uniques. Far from it. But releasing direct upgrades of previously existing dinosaurs (Thoradolosaurus is a T. Rex on steroids) is called powercreep and is not healthy for the game in the long run. The problem is, with buffing stuff so they can match up with things that are overpowered, you introduce powercreep and burn the innocent bystanders in the process.
It’s a rock-paper-scissor type of game. I rather have Ludia stick to that, instead of making scissor cutting scissors (direct upgrades of previous dinosaurs) or Swiss army knifes that are basically both rock and scissor (Trykosaurus is a tank busting tank, which is ridiculous, as well as Diloracheirus being a runner raptor while countering both raptors and tanks).