There are problems with Gygax's fantasy conventions that will never be solved. Truly a rush to play it but then it falls apart under scrutiny. People play DnD because that's what's played.
What's nice is DnD can be changed. People should be changing DnD and do. Finding a group that adapts to the Ref's changes is tough but possible. DnD remains a building block concept. Not to the caliber of Free-Style Role-Play, but DnD is roleplay generically in the minds of all.
Yet I've not been a fan of buying the flawed system and having to start over changing it.
"Endless adventure and untold excitement await! Prepare to venture forth with your bold companions into a world of heroic fantasy. Within these pages, you'll discover all the tools and options you need to create characters worthy of song and legend for the Dungeons & Dragons roleplaying game." (3.5e)
Someone tell me in digest what is new about DnD 6e. I'm betting the number of multi-class characters increases, as was the case with all the expansions of WoW.
Wizards should just clone WoW as a partnership. If Activision refuses, buy the company. They are Hasbro. Wait, I said that in reverse, Activision with a market cap of 58B can buy Hasbro at 13B.
Why would they? Table Top games are quaint. Sure, buy two and hold one for collector's market. DnD 3.5e sells for $45 at Noble Knight Games. Monte Cooke's City of Blue Something is three times that (on lower print run).