Not really,
@Cap'n Kobold mentioned the old negative hp thing. Back when -5hp meant instant death i was terrifying to be anywhere near the point where a crit could down you because that crit could take you way past -5 & instantly kill you if it got lucky or the damage rolls you've been seeing were unlucky.
There is also the massive impact that Save or Suck & Save or Lose spells & abilities had on things.The old ghoul was something that would make the party rethink an entire fight at almost any level the second it showed up because it could instantly cause someone to die while the 5e version is really no big deal. The old Trog would make you suffer for what very well might be the entire session (or longer) while the 5e one is pretty much guaranteed to be self nullifying even if a player fails a save the first time & it's certainly no going to matter in a later fight. 5e wraith does damage to max hp instead of con like the old wraith... but with the 5e one that damage is erased after sleeping for the night & needs to roll really high to hit anyone with decent ac while the old one was very
difficult to recover from & targeted touch AC for almost guaranteed hits against a very small pool of con. it's much more difficult to make combat that feels like it could be deadly in 5e than it was in the past & trying it in 5e tends to feel not very different from deadpool & wolverine playing rocket tag where the only real risk is getting hit by the rocker
and getting unlucky repeatedly
and having the rest of the party somehow unable to help you.