Challenge Dungeons make you git gud!

Part 13 of my posts to try and get D4 improved. I am going to post one-three ideas per day for a month then post a table of contents at the end. Hopefully these can gain some upvotes and dev attention or comment! I was going to just do one post but it would have been way too big. Please upvote and keep it positive guys!!

Challenge dungeons are added back. You get a prebuild player and level, items, 8 skills, and paragon and you have to complete the dungeon with it. Note that you are given two extra skills than you can fit on your hotbar. This is part of the player choice. You are given 5 skillpoints to add to skills. You cannot remove points of skills. You cannot change items. You can move up to 10 paragon points for free. Once you lock in your build for the dungeon you cant change it for that run. You cannot start the dungeon until you have locked in your build.
Completing challenge dungeons gives that dungeon +1% experience, +10% magic find, and +15% gold find permanently.
Dungeons with a completed challenge have a gold border on the map. Challenge dungeons go on a 4 hour timer if failed but each dungeon is on a separate timer.

Thanks for reading and as always be happy, worship loot, and may you be ever up to the challenge.

I could see Challenge Dungeons introduced as part of seasonal content, and I would just remove the permanent rewards for the dungeon. I honestly think that would lead to a poor gameplay loop in the end.

As a seasonal challenge thing, I would simply remove the choices you get for the character. Simply give them a pre-made that you have to work with. You could even make interesting challenges like start naked and you have to beat the boss using items you find in the dungeon, kind of thing. Of course, doing this would necessitate improving dungeons as a whole, first.

Starting naked and trying to get enough power to do dungeon is interesting spin on it.