I reckon the park might cope better than people expect without Nemesis.
Yes, it is high throughput, but I don’t think it’s the most popular ride on park, so I think having it closed would place less strain upon things than having, say, Smiler or Wicker Man closed for a year. A lot of people always say that Nemesis is viewed widely as the park’s star attraction, but I don’t think that’s necessarily true outside of enthusiast circles.
The issue should also be alleviated (at least partially) by having a full capacity Duel back open and the reopening of Sub Terra.