Ray of Enfeeblement: Just... what? He focuses entirely on the statblock not making strength attacks clear and misses... literally everything else about this spell that say massive improvements. The old version needed to hit their AC. Miss and the spell does nothing. then future con saves could end the effect. Now, the spell is a con save from the start, however, in the old version the effect was they deal half damage on weapon attacks that use strength. Now, luckily the MM did define monster's claws and tails as weapons. However NOW the if the target saves on the initial save? Disadvantage on their next attack roll. And if they fail, it is disadvantage on every strength check, strength attack, and strength save for the duration and it reduces the damage by 1d8 REGARDLESS OF WHERE THE DAMAGE COMES FROM. They cast magic missile? That's a damage roll, subtract 1d8.
This is crazy strong. as written.