Personally Kaleidoscope always felt too meta for me, technically it is just manipulation of Space and Time limited only by your Experience, Imagination and Creativity. But with the entire Multiverse or Omniverse as i prefer (considering the sheer scale) at your fingertips, the ability to time travel to your future and give yourself Millenia of Experience with it and borrowing the Imagination and Creativity of the Omniverses greatest it practically obliterates those limitations.
So where does it End unlike Power Manipulator and to a lesser extent Inspired Inventor which are both capped only at the the initial Rate of Power Gain and otherwise completely and explicitly unlimited, but can for example Kaleidoscope reach back and chose an alternate Version of yourself that took a different Option in the CYOA?
Can it give you the abilities of literally any fictional character or are some so Powerful they notice and erase you before you know it?
It trades out being able to bust the power curve on the high end in return for instant gratification and nigh-endless versatility.
Eh. That not really true, as you yourself mentioned Eidolon gives you the ability to give yourself a Power that makes temporary Trump based Abilities Permanent, but that isn't the End.
The CYOA says "any Power you wish, and may be swapped out at will" and "your Power will automatically provide abilities that aid you in surviving and achieving your goals". Even with your least favorable interpretation that still leaves you strong enough to throw yourself at literally any Earth Bet Threat with Zero Thought or Preparation because you gain those at Will.
Considering that for example Combat Knowledge, Tactics and Synergy and other knowledge would aid you in surviving, an Author would have to be either entirely uncreative with something that gives you instant access to any Power or actively limit and nerf the ability
Not to mention with that Temporary Trump Affects become Permanent Ability you can easily and instantly become Capital G God, just slot it in and let the other 4 charges you have cycle through every single imaginable Power with the only limiter being how fast you Interpret at Will (for me that's the speed of your thought something that gets hugely accelerated with the right Powers) and how fast the Power itself can cycle because if your goal is to get as many Powers and Strength in general as you can, it will simply do all the heavy lifting for you.
When you take a Googolplex amount of Powers which range form literally anything like boost other temporary gained Powers, merge all Power into cohesive massive whole that can affect itself, unlimited creativity, the collective knowledge of Humanity (take Victor Skill Stealing and take it up a Notch) to any other conceivable Power.
Why does it matter if you start at your weakest at redrawing Global Maps level if you can freely combine, merge and do whatever with your abilities?
And that's just the weakest interpretation it only says at the weakest level a Power is at a Threat Level of 8 with 9-10 being the Norm but there in no given Upper Limit.
Eidolon is the only Power in the CYOA that could be slapped on the most moronic idiot and still leave them able to tear through everything in Worm the instant they dropped in, even if they got ambushed by Zion the Planck-Second they emerged into Reality.
Any other Power except maybe Emps (wouldn't surprise me if he had some automatic response to Personal Danger that teleports him away or something similar that allow him to get his bearings) requires Conscious Thought or leaves you vulnerable to Exile (like Shaper and Alexandria) where you can simply be dealt with by being thrown into an alternate completely barren Universe.
You don't even have to worry about unconsciously wishing for a good fight because 1. That is pretty much impossible to achieve without depowering yourself to hell and back and 2. The Power helps you in surviving and achieving your Goals which probably doesn't include finding out you manipulated an entire Earth/Multiverse and caused untold suffering just because you have a fighting boner.
The more you think about these abilities the more ridiculous they get and honestly I am glad as I would never willing visit Earth Bet without such an "I Win" Button.
