I have no problem with R&D disruption. It's a very good idea, i think.
But i am under the impression that it doesn't affect the AI. I will check this this evening.
And secondly i would also like that it doesn't affect your current research.
It's okay to loose 10% each year, but if you launch a 10 years research for a goal of 555, you will reach 193. R&D is already VERY costly, especially if you add the tech disruption in account, reaching 100 needs a 3x3 R&D center entirely affected to this.
At last, R&D disruption gives you a limit to max R&D level and very soon.
If you (I don't remember, but I imagine) gain 400 for a 10 years R&D.
First round, are at 0, you target 400.
After 10 years, you reach 139. (400*0.9^10)
Then your next target in 10 years is 539
After 10 years your level is 49 (139 disrupted) and you reach 188.
Your next target is 588
After 10 years your level is 66, and you reach 205.
Your next target is 605
After 10 years your level is 71, and you reach 211.
Next target at 611
After 10 years your level is 74, and you reach 213.
Next target at 613
After 10 years your level is 74, and you reach 214.
You see ? R&D with BOTH disruption on current level and targeted level makes R&D nearly useless, or just good to maintain...after 20 or 30 years, it's impossible to progress.
Two ways : Or you makes R&D effect much stronger (and also its value), or you correct this effect.
What you can make is give progression of 400 (400 is a pure theorically number), but on the disrupted R&D.
Here, after 10 years you reach 139, after 10 years more your level is 49 (139 disrupted after 10 years), but you level reached will be 449, not 188.
I understand the fact that even research can become obsolescent but if you don't adapt it and doesn't make R&D more useful, it becomes useless and too costly.
And please, make disruption on AI
