That's because it's irrelevant to a new model. game card capacity is what it is, you can't make a new Switch that solves this problem.
Also, Power is not on the lower end of concerns, it's something that people will hear from certain developers, but the reality is that porting to the Switch from XB1/PS4 does require retooling the games quite a bit to get acceptable performance, if it's even possible. The reason you aren't getting Call of Duty on Switch this year, is because it wouldn't run at 60fps. This is a problem for these types of games. If you don't believe that example, here is another: Rainbowsix Siege, because the Switch can't run the game at expected performance levels, it can't be ported to the Switch. However, if there was a model that could run the game and had a decent install base of even 10 Million units? Developers would likely bring these games to the Switch platform and allow the current model to struggle with the game or even stream it.
Don't expect a super powerful Switch, but a bump that puts it in the ballpark of current gen consoles, that is something Nintendo can do for the current Switch price, and it's something they should do, to meet the expectations of their developer partners as Next gen gets underway.
