AFOWO Raksha Addela mein under-construction quality kaise check karein?

Did a site visit to AFOWO Raksha Addela last weekend. Builders generally show a decorated sample flat, but I tried to check an under-construction unit. Noticed ki plaster finish mein thoda unevenness thi, aur electrical conduit lines bhi thoda messy lag rahe the. My current 2BHK mein baad mein bahut issues aaye the seepage ke. For an investor like me, construction quality bahut important hai for future resale value and tenant attraction. Kya aur kuch specific things hain jo under-construction site pe check karna chahiye, especially hidden stuff? I'm thinking of upgrading to a 3BHK, so don't want future headaches. Any tips?