Before the rift battles changes, each week I used to (really) struggle to reach a Diamond 4 rank, most of the battles I won was because people searched for getting a downgrade (I want to believe because they had a better map than mine) and people started to get frustration (including myself) and get bored because the score for ranks started to get lower each week, people entered the mode just to accomplish the requirement and then try to climb again (sometimes being overqualified to the rank they got) or I heard about some people that got a rank they felt and proved they weren't ready (so they got a rank where there was players with a better map and resources and that ones that searched the downgrade, woah). I have played some "new" rift battles and I can say that I enjoyed the mode, there are more equal matches and the chances of success has improved (for any side). I didn't like the idea of using twice the characters, but I can tell that it has benefits, for the people that doesn't have a vast roster it opens a great chance to complete and face a tough rival but on the top battles, it would bother me, because on the greatest ranks it becomes a strategy battle or a mode where you had to faint the strongest characters but now they can use twice the characters, no matter they would repeat, they know their defense would handle the "penalty" of using the same character. About the boss node being "super easy", I can tell that I still have some troubles but I enjoy the battle, instead of getting each 6 of 7 battles, time up loses. It's a challenge now and not the mode you have to flip a coin and pray to have a chance.
I know that I won't get the Diamond 4 tier anymore and this doesn't bother me, Gold 1 (or if I fall to Gold 2) now can give you a better amount of shards than the old D4 used to give you, so I'm fine (Diamond keys I know, but it's only one).
I heard about people complaining that the mode isn't a decent mode anymore and it's worse than the old one, well in theory, once this season it's over, they should find more "suitable" opponents (Also after having 10+ diamonds the game would become easier I guess), more variety and equal matches, and I want to believe they will have more chances the avoid of getting a D3 vs S1 Match or D2 vs G1 (True G1, not the apparent G1).
That's my first impression, I have good vibes about what would happen to the mode, but just the time will tell us.