No, it's not a huge mistake lol. It's like a new launch, and there will be a series of these before this game is reborn. It was hard for players in the very beginning, and it is again because fundamentals have changed. Like I said, it will equalize.
Current players need to understand, with the extreme nature of the incoming changes, you're playing a glorified beta right now. And what you're playing today is a different game than yesterday. Give it more than a few hours to find it's feet.
And upgrading current gear presents it's own set of massive problems, mainly in that it damages the crafting community.