3.6.3, and the great Map Drop Fallacy

[Chadvoluted]

So far, I have data on

30 maps - T4, T5 (Including the few times that I've encountered Zana. She's consistently sat in T5 Maps that I've never seen, so I haven't been able to purposefully run her)
12 Nexus Memories Comparable level zones to the maps
1 Temple of Atzoatl Run at T4 Level.

In those 30 maps, I've received:

3 Maps of a tier higher
12 maps of same tier
14 maps of lower tier

IN the Nexus, I have received

1 Map same tier
2 maps lower tier

In the Atzoatl Temple, I had 7 same tier maps drop, because I had level the cartography room up.

That still puts me in a -10 hole. I've never had this before. Maybe it's because I don't play league often enough. But so far, the White / Yellow Map Drop in League is worse than Red Maps were in Standard Last Patch.

Maybe I'm just the one stuck on the low end of the RNG this patch? But man, this is awful. Coupled with the other problems that the game has right now, I'm not sure I'm going to stick around post 3.7. They're going to have to seriously WOW me at this point.