Currently I am T500, with the revised product upload limit of 10 products. At this pace, to add all designs, and product combinations, it will take approximately 3,000 days to completely upload all combinations. Even at my normal 25 product limit, it would still take 1,000 days, minimum. 3 years... This is little motivation, as even at the normal 25 product limit, it would take 2+ days to upload all combination of a single design. I can't even imagine how a T2000, or T10,000 Mercher could manage this.
The "easy" way to solve this would be to change the limit to designs, in their entirety, not products. While I appreciate being able to add more designs, there is little motivation to spend 3+ years just uploading my current batch of designs to their full potential, counter to what Amazon obviously wants, more products in more Amazon marketplaces.