The Beta was limited to active subscribers. The % of active subscribers who actually played Vanilla and actually got a Beta invite is likely extremely small. Thus, there is a high likelihood that many of these Bug reports are being generated by players that never played Vanilla.
I also don't know who these Vanilla Champions you refer to are but it was clear from the get go that Classic wasn't going to have the QoL features you reference.
All this list does demonstrate, conclusively, is how much hand holding goes on in the current game compared to Vanilla and how much the player base has been spoiled as a result of having everything handed to them on a silver platter (glowing quest objectives etc etc).
The next Not a Bug list will probably contain these statements:
"Aggroing numerous mobs and dying often while levelling is intended"
"Having to use CC on every pack of mobs in a dungeon is intended"
"Waiting for your Warrior to get 3 sunders on mobs before you begin dpsing is intended"