This change destroyed my game
No it didn't, the bug fixes did
The 50% discount from tech (which has somehow become 60% in the new patch) now applies to the whole value (as it was intended) instead of only applying to the +5 per level (a bug in 1.12). fixing that bug is a massively more significant change than removing the +5 per click.
Developmetn efficiency -60%
land reform -20%
full economy focus -20%
reichsreform -5%
organized through bishops -5%
capital city -10%
university -20%
development +400%
coastal center of trade -5%
Mind you, I had land reform custom idea with 20% discount
You playing as a custom faction with a specialization in development makes a world of difference, especially with how the percentages stack.
You have stacked so many discounts on this one thing, that the result is obvious.
It is significantly easier to get free coring on conquered nations via stacking.
OR stack army boosters to the point of your armies being unstopable. The issue is with stacking giving accelerating rather than diminishing returns because percentages are added as a %p (percent points) not as a % (percent)
that is, -25% and then another -25% give a total of -50% (meaning the second discount was actually -33%) instead of -43.75%
Also, you had a good capital to begin with (not mountainous, but coastal center of trade instead). and I am going to say I suspect you developed a lot and spend little on other things (how much did you spend on annexing?), so actually, that 200 could be perfectly fine and finally a way to actually go tall (it is still less dev than you would have from conquering)
I still think the 2% per dev point needs to go away. you want to avoid mega roma then you need to fix the way % stack in this game
Step 1: Percentages should stack correctly instead of additively. (2 x 50% discounts should result in paying 25%, not free)
Step 2: Reduce the size of the discounts. (aka, -30% from tech instead of -60%, -10% from university instead of -20%, etc)
Inflating the base price is an awful solution. you could still stack the discounts for a bunch of free/near free development