If Russian didn't interfere and remain totally neutral than this is actually means being with Azeris. Azeris have Turk on their side while Armenian have Russia so if Armenian loose Russian support (because of some idiot) than they are by-default on the losing side.
You can't make any plane stealthy by just applying RAM Coatings. RAM contribution in Stealth is small compared to other factors. Shaping is the most important in stealth.
5th Gen is not 4.5 Gen with stealth shaping. There is lot more than this to be a true 5th Gen Qualifier and Above All the engine factor is also a big question here.
You are right It is expensive but reality is right now Israel is getting massive support including arms supply from its allies while Muslim countries didn't have the courage to supply humanitarian aid, food, water, fuel, medicines etc. Unfortunately.
Any Air to Air missile engagement beyond 100 km need serious luck and foolishness from opponent otherwise its practically useless. There are other things which are important than higher ranges.
Probably International politics or Indian internal issues are involved here more than Pakistan internal situation as this will only help Pakistanis unite.