Idk if this idea will click with everyone but I'll float it out there anyway, for the sake of discussion. 

Basically I think you could alleviate a lot of player angst in Tooie by otherwise changing nothing, but just reclassifying some Jiggies to be worth 2 Jiggies now instead of 1. Some Jiggies clearly are *way* more difficult / take way more time than other ones do, and it makes sense to me that if the player is putting in double the effort for something......why not be double-rewarded for it?

It'd just help keep players feeling motivated, and make Tooie a bit easier to swallow... For lack of a better name I'll just call these double Jiggies 'Crystal Jiggies' cuz I'm unoriginal lol.

And for the sake of simplicity, I'll make it exactly 7 Gold Jiggies and 3 Crystal ones per level. (Originally I was gonna keep it to 2 each, but I realized it'd be simpler to just have all bosses reward you a Crystal one, and more satisfying) I would designate these special 2x Crystal Jiggies as such!

Mayahem Temple  
\*  *Beat all 3 kickball minigames*  
*\*  The Pillars Vault Jiggy* (This one isn't hard, just a good reward for Tooie's first real instance of backtracking)  
\*  *Beat Targitzan*

Glitter Gulch Mine  
\*  *The Breegull Blaster dynamite minigame*  
*\*  Rescue Dilberta from imprisonment*  
*\*  Beat Old King Coal*

Witchyworld  
\*  *The Saucer Of Peril minigame*  
*\*  Finding Mrs. Boggy's kids* (or Dodgem Dome would be a fine alternative)  
\*  *Beat Mr. Patch*

Jolly Roger's Lagoon  
\*  *Protect Chris P. Bacon*  
*\*  The pig kids' swimming pool*  
*\*  Beat Lord Woo Fak Fak*

Terrydactyland  
\*  *Solve all 3 of the Styracosaurus dino family's problems*  
*\*  Defeat all 5 Rocknut cavemen*  
*\*  Hatch all 4 of Terry's eggs* (When you beat him he gives you a Gold Jiggy and stubbornly withholds the Crystal one as incentive for you to find his kids)

Grunty Industries (I enjoy the idea of this world being the one exception to the rule, where it would have 3 Gold Jiggies and 7 Crystal ones instead....however I'll keep things simple and NOT entertain that idea here lol)  
\*  *Find & clean all the Skivvy rabbits*  
*\*  Clinker's Cavern Breegull Blaster minigame*  
*\*  Beat Weldar*

Hailfire Peaks  
\*  *Colosseum Kickball tournament*  
*\*  The alien family*  
*\*  Beat the dragon brothers*

Cloud Cuckooland  
\*  *Beat Canary Mary*  
*\*  Find all 4 codes to open the Superstash safebox*  
*\*  Beat Mingy Jongo*

​That all maths out to having 90 Jiggies in the game which are split between 66 Gold and 24 Crystal. Since this is MY Imagination Zone and I can do whatever I want, let's say they also add 10 more Jiggies in the hub world areas, 9 Gold 1 Crystal. So it'd all amount to  
  
\*  100 Jiggies in the game  
\*  75 Gold ones & 25 of the Crystal double ones  
\*  Therefore 125 is the highest Jiggy score, and the game would unlock Grunty whenever you get a Jiggy score of 100 (players who choose to prioritize the double Jiggies can reach the end of the game quicker.)

Some Jiggies in Banjo-Tooie should've been worth 2 Jiggies