Well I disagree with the idea that control spells are ruining 5E, they are the best part of 5E IMO.
That said the changes to Command are a mixed bag. It is more useful now and is extremely effective at all levels. You could argue that this is the only control spell you need given how well it upcasts.
On the other hand you are limited to the specific commands in the spell description now. You used to be able to come up with creative or funny alternatives: "Jump", "Daydream", "Defecate" ..... now those are not options. It is more of a straightforward combat spell now.
What I would like to see is keep the changes that make it usable against anything but allow any one word command.