I used to think I wanted a mode like this: play against the computer for good rewards. Now i think we would be better without it.
1) There's less people in the real rooms. Legendary missions were a genius way to spark interest in vs fighting. Now that is all undone as people (myself included) grind on Kate all day.
2) Common packs
are pointless. I can fight 8 matches against Kate and see 3 cards. If I like the last one, I can go the extra 10, but 18 matches is all I have time for most days. Which means I won't play against people unless I absolutely have to for an LD mission. Which brings me to...
3) The duel rewards are often better than the LD cards. Getting these good commons is great, but it just takes away from the friendly competition in UR.
4) Facing off against Kate actively makes me a worse player. I'm not the best player, but once I've been grinding on Kate for a while, I become total crap. It takes me a little warmup to face humans again.
I appreciate all the work that goes into this game, and this game mode seemed like a dream come true, but I kind of wish it would go away. Sorry. Ideally, I would rather face people than grind on Kate, but human nature says I'm going to grind on Kate every day until I burn out.