Pizza
Thrill Kill
Not even close. In Deception you only had to know the times and locations of characters/chests, you could even "meditate" to make time fly faster. And there only two or three unlockables in the Krypt, and they weren't too expensive either. The game throws koins at your face all the time. I have it fresh in my mind because I replayed it recently."So instead of playing MK: Deception (like, fighting or training) I should be grinding the Konquest mode to unlock characters?"
Yes.
Although to be clear, I'm definitely not against a higher Time Krystal drop rate attached to kasual/ranked play. I haven't played any 1v1 yet so I don't know whether the current rate feels reasonable or not. Maybe it needs a bump. Maybe it needs a massive bump. But this is fundamentally different from what OP wrote about. There is no direct relation between how many Time Krystals you get in game, and how much real $$ skins cost to unlock.
srsly