I am an avid reader of this forum, mostly of rumours threads, but never posted here. So first of all I would like to say that you all did a great job keeping this forum alive and sharing your passion and knowledge.
Because I saw a lot of negative comments in last few hours, I have analyzed the route and, quite strange for many, I really like it. I'm not a fan of using same combo every year or for every time a big climb appears in Giro, like Mortirolo-Aprica, Finestre - Sestriere, Stelvio - sth, so I'm not dissapointed with Aprica stage.
First week is great imo. Some stages for sprinters, a short tt and 3 stages for gc riders. Etna is excellent for 1st MTF. (probably there won't be big gaps, but is hard enough for someone brave, like Contador proved it in 2011). Potenza stage is well designed, 6km at about 10% at 60km to go sounds good. If someone will dare to try, maybe we'll see a great stage. Blockhaus stage is the hardest I remember in a first week.
Second week will be hit or miss. It looks easy, but I think it can produce great racing. In Jesi and Cuneo stages I think everyone we'll try to drop pure sprinters, can be an interesting fight for ciclamino jersey. Genoa is for breakaway. Then, we have Torino stage that I really like, looks like a mini LBL. I expect some gaps between gc riders here. Cogne is the only stage I don't like, but I can see attacks happening on Verrogne because is just before restday.
I really like Aprica stage. Lots of places to attack, Mortirolo, Teglio or Santa Caterina. Will anyone attack before Santa Caterina? It's hard to tell, but imo there is enough space to do it. Minutes can be gained in this stage. Next stage is interesting as well. Vetriolo will reduce peloton and we'll see another gc battle on Menador. 8 km at 10% is really hard. The stage that passes through Slovenia is good enough, while San Pellegrino - Pordoi - Marmolada is a pretty decent combo for last mountain stage. Sestriere in 2020 and last stage this year were easier and still have produced good races.
It's important to keep in mind that perfect design exists just on this kind of forums. There are a lot of factors which complicate drawing a gt.
Last but not least, riders are the most important thing when it comes to spectacular races. If Contador was still racing would probably find places to make long range attacks in at least 5 stages. Covadonga was great this year because of Bernal and Roglic not because of design.