Right now they are working on integrating ETH, and it's tokens to the platform, along with trading bots etc.
Yes. Like I said yesterday, it's too early to conclude that stakenet DEX aggregator will solve the problem with status quo DEX.
As far as I know, it shouldn't really take that long to develop. They need their priorities straight when working on this project, so I'm sure once they've released the DEX, the Aggregator will be implemented shortly after.
It's not that easy. If I remember correctly, StakeNet has about 10 or more features/products that they're are currently working on. After the DEX release, It'll still take a while to get the DEX aggregator up and running as series of testing has to be made to ensure that the software work as it should.