Personally, I find the Battlez really boring. The same board over and over again just doesn't do it for me.
And really, was it worth what we lost?
No more quests every 4 hours
No more daily gem quests (actually no more daily quests period although they created a whole new quests tab for it).
We've already been ripped off on the daily game earned coin purchase of seed packets for plants. Up until January of this year I could buy up to 85 seed packets for a random plant every day (60 for $20,000; 20 for $5,000; and 5 for $1,000). In January, this changed for a single $5,000 coin purchase for three different plants. I guess you're spreading out the seed packets over more plants which would be good, but it was a net loss of 25 seed packets per day.
It's hard enough to build up seed packets for your plants without taking away all the quests and features that helped you get them. The "rewards" for streaks in Battlez don't even come close to compensating for this loss and, as others have commented, unless you shell out for the gauntlets you aren't going to rise too high in the rankings.
Awful trade offs for a meh feature. I can't see that I'll be playing this game for that much longer.