As someone who never considered power levels bullshit, and always cared for consistency in them, and thought that they were perfectly fine in the original manga until super fucked everything up, I'm perfectly fine with everything they did in this arc till now, including No. 17's power up.
I mean, we've never seen the result of an android training before, it was established in the series that someone who never trained before will get crazy gains when he does for the first time, No. 17 has always showed pride in his power, and the fact that he can't sense energy nor be sensed give a perfectly convincing reason for why he wasn't involved in any of the previous arc despite being super powerful.
I mean he had 10 years off-screen to achieve this level. I can buy that. It's not complete bullshit like Freiza and Trunks situations. It's something that's can be argued against, but at least has some thought put in it.