Yes, LCO is biggest necessity and disadvantage of Excitel.
I myself have a MTNL connection,it is free from my relative's office(Airtel and other phone is also there, but I didn't bother with it as FUP was too low before the revision). It is 2mbps and right now the FUP limit was 'broken' but max we could use was 25GB. It is good for browsing(except image heavy), gives YT at 720p and DM at 480p. Sites like Dictionaries,message boards, manuals load fast. Don't use video as much and it is not good anyway. Don't DL torrents too.
I wish the connection was 4mbps at least so I could get 1080p YT and 720 DM. 2mbps on 50gb+ doesn't make much sense. Maybe they're doing this to benefit competitors?
I have an LCO option too but reluctant to spend money as I'm not using that much streaming or torrents.