ETA: For those looking for a side-by-side look at how the canon E-Wing compares to the source material: -
Honestly I'd call this a significant improvement overall. Less spindly, more substantial, no silly roof cannon or hidden astromech bay, and they even gave it an extra pair of weapons close in where the wing meets the fuselage (I'm assuming concussion missile launchers?)
It still doesn't hold a candle to the X-Wing which looks cool from any angle; the E-wing on the other hand just looks cool from a few angles. Any profile shot makes it hard to hide the vertical imbalance emphasised by the hunched back cockpit and the underslung engines, but there's nothing they could do to fix that short of a total redesign, and well then it really wouldn't be an E-Wing anymore.
I do like how small they made it though. You really get the sense that this is far less formidable than an X-Wing and more of a local security patrol/pursuit craft than a true fighter. The fact that they went to the trouble of building at least a partial full scale mock-up tells me we're probably going to see a fair amount of these in the coming years.
Oh I'm quite sure Palpatine had a list of planets that were getting destroyed, no matter what, with Lothal being a very late addition. Not just for having the temerity to be liberated from his rule, but out of sheer spite towards Ezra for twice preventing him from accessing Void Space. Sidious is nothing if not vindictive.
Speaking of his list; I'm sure Alderaan was on it no matter what. Same for Chandrilla for obvious reasons, Naboo because he clearly hated his homeworld on general principle (even tried to give it to Vader as his domain before he insisted on being given Mustafar instead.) Any world that was a thorn in his side but still contained useful resources like Mimban or Kashyyyk would at least be due a single reactor ignition shot to the capital.
I must have missed the part where Luke was answering directly to the Senate . . .