Positives. Ok.
Dicing off for priority with swap-on-draw: This is good, it lends some extra drama to situations where you really
need to get priority.
Alternate activation: This is excellent, as is the 2 action points to spend thing. It means you're never more than a few seconds away from being able to do something useful and have a wider variety of action combinations. I've played some ORB/NCE games in the past where my opponent has taken 20 minutes to painstakingly crawl through his movement phase with exacting precision - and then declared everyone hidden. See my next point!
Abolishing hiding & making overwatch a skill: Brilliant choice. Hiding still sort-of exists in the Take Cover action, but it suitably gimps your character and becomes something to do out of necessity rather than a matter of course. As
@MusingWarboss said above, Overwatch and (imo) hiding made for some very, very dull games of ORB & NCE - moreso when you stopped being able to charge hidden fighters. We were
so close to fixing this in the latest NCE but bottled at the last moment.
Different basic stat lines for different gangs gives more instant flavour than freshy rolled ORB/NCE gangs which were all basically the same save weapon loadout.
Grenades that work like grenades! Firing/throwing them at an area rather than aiming at a person. Good stuff.
I like the tiles too - I still prefer playing on a full 3D table, but the tiles are very convenient for a change or a quick game with much reduced setup time. I don't have table space at the moment so the tiles have been a godsend. It remains to be seen whether they'll keep getting used once I have my talbe set up semi-permanently in the garage.
The models are lovely. I would have preferred if they were the same scale as the old ones, but the change isn't
too jarring amongst the Escher. It's blindingly obvious with Goliaths but I never had any old ones.
I'm a sucker for purple & yellow so I like my Escher dice.
And the biggie: The rules are actually pretty good
if you and your mates can agree a sensible course of action with the ones which are badly written, unclear or simply do not exist. I imagine most groups can work things out reasonably and if not, the Arbitrator can decide.
If you don't really have an Arbitrator I find challenging those that disagree with you to a naked, oiled up knife fight usually settles matters. You can have that mental image for free.