With no wbuffs or harder raid bosses will certainly provide a greater challenge than vanilla. Many complained about MC being an insult. This WOW TBC Gold has been rectified in a way. The developers are now reportedly fixing mage boosting. That will help improve the leveling experience and world interactions.
Many "Classic" players are looking for #nochanges. Classic+ will not be Classic and would be appealing to players who aren't "vanilla or buy WOW Classic TBC Gold vanilla" players. Modern MMO players want modern designs and older players prefer a straightforward designs. They're not great at their game, so it is recommended to keep no changes.