I don’t think it’s possible for them to process any slower.
Whenever my opponent plays Tamayos journal I want to cry. It’s so so so slow now I don’t think I can put into words how frustrating it’s become.
Any kind of increased speed setting is badly needed
This is speculation:
Slowdown appears to be a fix for this bug: https://forums.505go.com/discussion/55103
It’s a pretty bad workaround 
I just saw a preview to that site you’re working on over on Reddit.
Looks promising. That’s really cool of you!
jk still broke, managed to do it with Oath of Liliana
That’s most likely the case.
Since they have no clue on how to properly fix bug they tried with clues… But since they have no clue failed and the bug is still there, just less likely to happen.
Not just clues, seems to be supports in general
Can confirm. I fought a most irritating jace 2 deck whose entire strategy seemed to be to get me to throw my phone at wall in frustration by mass casting supports and clues.
Of course they did not take the time to make it work only on casted supports(card) so they slowed down all supports including clues.
It’s this kind of stuff that make me believe the game won’t never get better. It will grow bigger, not better.
All changes are made as patches without working toward future development.
They look at future only when adding new stuff.
Fixing, enhancing or balancing old stuff looks like a sub sub sub priority to them most of the time.