I am still undecided if I actually want an amnesia or not. I agree with you that we will get proper romance and falling in love process all over again only this time done more gradually and intensely but still that would mean I will have to tolerate Mallu mata and her 12 yrs bhashan for a longer time since she might force Ashu into believing that they were together before he lost his memory.
Then on the other hand if not for PA it would be difficult to suddenly up the romance quotient because most people here are used to the no touch romance (I am not one of them but people might question) however if for PA people will accept that this Ashutosh is more passionate and hence more comfortable showing the physical attraction and stuff like that.