Best Of

I don't entirely understand the question here.
We consistently release new Champions to the 7 Star pool in various ways.

There are 8 new 7 Star Champions coming in August -

Are you wanting us to just mass drop every 7 Star into the pool all at once?

Quote a simple question really. What’s stopping you from increasing the release cadence of champions not available as 7*’s?

We’re already at the rank 4 progression of 7* and there’s a lot of champions not released in the highest rarity. At the pace we’re on we’ll be moving towards 8* before the full champion pool has been released as 7*’s.

Again, we're releasing 8 of them into the 7 Star Pool next month, I think that's quite a lot at once.
We need to have somewhere to go and things to release -

There are 300 Champions in the game now. When 6 Stars were released, there were about 150...
Of course, all of those Champions entered the highest rarity quicker than 7 Stars did because there were about half as many of them.

My biggest criticism is that there is hardly any incentive for the average player to go beyond 10k points a week which should be a failure in terms of kabams engagement goals.

Why should it be a failure? Remember this is a side quest, this content sits in the slot for side quest content. It is an attempt to breathe some new life into that part of the game. It isn't intended to be a completely new game mode like Battlegrounds. Many players don't even do the side quest monthly. If more players engaged in this than they normally do the typical side quest, even if all they did was the milestone minimums (which would be no different than fully exploring the typical side quest) then that would seem to me to be an overall success.

No matter how much we like it or hate it, it will be gone next month. It isn't intended to hold our attention continuously. But for years players have been complaining about how boring side quests are, and how repetitive they are, and often how difficult they are when they are different (think Rifts). If this is the sort of thing that can come in periodically to mix things up in the meta quests, and players generally engage with it more than they do the standard meta (side) quests, that's overall a good thing.