I would put this in much stronger terms. The theory unambiguously indicates that changing from block reward to txn fees will fail under the current design unless mining becomes monopolized.
We will return to this topic in 30 years, when it will be possible to verify these claims.
For now, stick to the matter at hand. And the matter is, we don't need any fix for a problem that neither does exist yet or it is certain it will ever exist.