The first game was insanely hard to figure out. Yeah you could pick it up and play it, but actually understanding the game became very complicated. There were a large number of infantry that were carrying weapons mostly designed for wiping out other infantry... then you had other infantry that were only average vs other infantry but alright vs tanks. A lot of these little things made picking a deck pretty complicated and got worse if you didn't understand the difference between a Strella-2 and an RPO.
I think overwhelmingly this game describes what units are and what they're used for far better with greatly improved icons and much better information control.
As well with national, time limited, and specialized decks you can shrink the number of available units so that picking is far less tedious.
On top of all of that there are a large number of pre-made decks. These act as a template for future decks and give you a chance to try out a large number of units and seeing what works before you make your own deck.
Eugen Systems is really banking on a large co-op and single player community for this game and have developed campaigns for this. How accessible it is will depend on how forced tutorial information is. When studios force tutorials on you it's generally done in a very slow paced deliberate and easy to understand way.... it also ends up making the game overall more accessible.