I don't think this will ever happen. When I think about respectable forums, I think about forums with many interested experts. When I think about Bitcointalk, I think about a shitload of spammers who are only here to earn money.
Even the most notorious forum's like HackForum where newbies are cyber-bullied are better in terms of content and quality posts than bitcointalk. One reason could be, most of the power in the forum is given to people who are not technically aware of bitcoin. It's a bitcoin forum, the only people added to the DT, Mod and other staff should be bitcoin experts. I'm not even surprised most of the Merits are distributed in the forum's Meta section which is sad. Technically speaking, the Meta section is the least informative section in the context of bitcoin/blockchain in general. It's so not fair to the bitcoin forum that people find quality in something that isn't related to bitcoins.
It's not that informed discussions don't exist, it's just a very small fraction, which makes them hard to find. I'll keep doing what I always do: report the bad stuff, merit the good stuff.
The fraction of people who are technically/logically strong to create or talk on informative sections is very low. Even if they're around, they don't participate in the discussions.