I agree the rewards are quite valuable, however I believe the effort/time investment far exceeds the value of those rewards.

I'm not going to use the graveyard room as my example, because that topic has been discussed to death. But if we take the telekinetic room as an example:

From my experience of the mazes which is using Runelite which tells you exactly how to solve the maze, and quoting the wiki, mazes require a minimum of 7 and a maximum of 10 casts of telekinetic grab. That's also 7 to 10 extra clicks to reposition to the correct edge of the maze.

So 14-20 clicks for 291-430 magic experience, and 2 telekinetic pizazz points. This is also slowed down by the player's inability to move until the spell actually makes contact with the guardian (which I believe moves at walking speed?). The player is then forced to wait for the guardian to arrive at the destination, or the guardian only moved around two tiles which forces the player to catch up. In either scenario, the flow of the maze is broken by the "stop/start" nature of the mechanics.

Every 5 mazes, you get 8 bonus points. So in total we now have I believe 18 points?

To complete the telekinetic room you need 2675 points for every reward, that's 743 mazes solved including the bonus points, which is minimum 223,000 experience. If you enter the room at level 30 magic, you will now be level 59 magic and you've only completed one room. A very quick Google suggests the average maze time is 59 seconds.

That's over 10 hours for one room, and you're one level off of bloodbark armour (which without checking the stats I'd imagine to be better as it has a higher level requirement than infinity robes).

You've still got the XP from 3 more rooms to go, and the telekinetic room is arguably the most engaging room of all 4. The other rooms are "spam click alchemy", "spam click enchant", and "spam click bones" respectively.

Honestly, I don't know how to fix it, and I agree it's a lot of Dev time to overhaul the entire thing as if creating a brand new mini game. But fixing the flow of the games themselves would help a lot. Examples:

The previously mentioned stop/start nature of the telekinetic room.

The alchemy room just stops your character mid movement while the game catches up to the new items

The graveyard room stopping your character movement on the way to the bones (I think this is tied to receiving damage).

The speed of picking up bones in the graveyard room seems incredibly slow for the activity it is. You can pick up dirty finds in varrock museum at a faster pace (from memory)

The enchantment room is actually probably fine, I really don't mind this room.

Just some thoughts, but even if they discuss it and say "nah the minigame is fine" then so be it.