I have only played one game after the new patch but so far this patch seems like a really big downgrade:

1. Why would you not reveal all legendary units at the start? This will force players to either go for a synergy that does not require any legendary unit, go for a synergy that is already revealed or go for anything not revealed and basically try your luck. All three of those choices are bad, since either there is high contest for the units or you go for something that is not available in the pool.

2. Whats with this huge shamans nerf? Shamans now need 3 pieces and require either an active item or an active ability for them to transform? The spells of the base shaman units are not good at all so it makes the pieces worse now that they need their spell to be cast until they transform, not to mention there is a high chance of them dying now before transforming. Giving them an item for instant transformation?-> Great, now you just wasted an item since they get lost after the transformation... Yeah you can go for 6 shamans so that they keep their items but lets be real: 6 shamans require either all shamans in the game to be available (which you don't know thanks to the change to legendary units) or 4 wizards, which is super bad itself.

So in my opinion: One of the worst patches in the history of DAC.