Well.
When i look at the 4th and 5th edition rules they seem to be more "mmo-like". I have started with AD&D 30 years ago and even though i like that, the new rules are a bit more enjoyable in certain areas. I haven't read a lot of 5e but playing BG3 shows that some changes can be good for fluid gameplay, while others are not.
I find the jumping pretty hilarious. First too far for normal, fully equipped chars. And the transition form jump to fall needs work. (meaning prone stat and damage)
The height advantage good for ranged. The bonus may be a bit high though. Look at the curve an arrow takes. Then you will recognize why higher ground makes hitting a bit easier.
What annoys me more is that i cannot aim some spells when the enemy is higher and get the "too far" info.