Шурик
Auto-translated
NO! The 5th installment wasn't made AS A RESULT of learning from the mistakes of the 4th.
The 5th installment was made as a return to the 3rd, to revive and continue interest IN THE ENTIRE HEROES SERIES!
I think they were just afraid of repeating the same mistakes a second time, and tried to create something new from the old. If there hadn't been flaws in the 4th, we wouldn't have seen the 5th installment as it is...