How easy was it to understand the new Operation and what you have to do to succeed?
Very, the objectives were clear and the minimap and markers do a good enough job to convey them visually.
How was using a Necramech in a “normal” tileset?
Bad, as are all and every case of using a Necramech in this game. It's a straight up downgrade from the Warframes in every aspect imaginable - controls, maneuverability, power. They are only being used for the event because they've been shoehorned in, otherwise nobody would have bothered. Necramechs are literally "Wasted devel