The overall design is more important than X kilometers of ITT or Y number of MTF. And for Le Tour, there are serious geographic limitations when it comes to covering all regions in two, three year cycles. Not that ASO cares about it, but as a fan, I do. Until I get what I want, I'll give GTs an 8.
My perfect Tour (I know France's geography much better than Italy's or Spain's) start on a Wednesday,, and as a fan I like a prologue to start or a short, less than 15 km ITT. I try to gauge/guess the riders' form, read what you folks post, that's a great beginning. Small time gaps to defend the next day on hilly terrain, say Ardennes, or if the route is different, maybe wind coastal start and hilly finish in northern Bretagne. Friday is OK for a TTT, cobbled stage, and Saturday and Sunday two medium mountain stages with multiple good climbs towards the finish. A Vosges/Jura combo maybe, or Super-Jura and a Swiss finish. On the other side, the Massif Central offers limited options, but Puy Mary-Perthus is no picnic on a Sunday, for example. And it's a good TV week-end for the fans, which must be there to get a 10. No crappy stages on the week-end!!!
Monday off (I know Netserk, but I don't want busted riders blaming me for their doping). Rest day it is, and on Tuesday, it all depends on where the route is. BUT: in the entire design, my wish is only one pure sprinter stage, and we can make it the longest stage of the race. Nantes-Bordeaux at the '84 TdF, 338 km, and The Great Jan Raas prevailed. Every flat or flat-ish stage profile must contain a healthy dose of sterrato,, cobbles, finish with hills and muritos.
Like many, I want different types of mountain stage designs, but more than anything, novelty. Maybe a finish after a short descent from Ventoux/Bedouin to the Mont Serein resort? Sarenne-AdH descent-Sabot newly gravelled MTF? Or a Cote de Laffrey finish after an up-and-down around Grenoble. I'd like to see Glieres as a MTF finish. Madeleine via La Chambre short descent, Lachat and it's brutal finish. Pays Basque...
In my model, stages 3 and 4 were mountainous. The ideal is no more than three consecutive mountain stages, and only if two of them are medium mountain stages. And they happen on the weekends. Therefore stages 9 and 10 are weekend mountain stages. 15 and 16 also are week-end mountain stages. That's when the ITT comes stage 16 (the last Tuesday), or rather the next day. Two more mountain stages, or two medium, one high altitude. Then Paris. And every other year, skip the stage 16 ITT, and have it in Paris. There will be drama, podium spots on the line, maybe the overall win in the balance, an all-day event for us to appreciate.
Call me dumb, and idealist, a stoner (and you may be true), yes, at times, riders make the race: The greats do. Pogacar made the '22 TdF great. Hinault made '80 LBL great, Ocana made the '71 TdF great, Nibali dominated the '14 Tour before it even started. Roche's '87 campaign is a thing of beauty, but we grew accustomed to bots and predictable outcomes. Riders don't but they can make the race.
I have spent an hour on this, no more edits and style. I give myself an 8.