I like it, but I kind of wish there was a selection of starter decks instead of the freedom to build your own starter deck. Alot of people would probably dissagree with that statement.
I agree, the most boring part is this "net-decking" starter deck and first 3-4 matches I would say. Where the fun really starts is after 5-6 matches when all players have their crazy decks ready. But you have to win few matches to get there, that's not so exciting. Also I would appreciate to start with less cards, like in dungeon runs - where you start with 8-10 cards? I guess? Then there would be better feeling of progression of your deck (like in solo runs) if you know what I mean. Now every pick is more like "how do I not ruin my tier 1 deck too much" instead of "how do I improve my existing starter deck".