I think the $99 change fee is more than fair. Still a big improvement over pre-covid, surprised they didn't go back to making those totally non-changeable.
For the MQM's and RDM's they should have reduced the earnings to like 50% instead of eliminating them. I'm sure people flying on an E fare don't fly enough enough to qualify for diamond status anyway and if it's a once a year ma and pa they aren't going to accumulate that many RDM's anyway.
At least you can still carry on unlike United and change your seat after it's assigned