Why is it that sound recorded from the split of mains out of the mixer sounded dry(especially the vocals), eventhough it sounded wet/okay from the speakers during the show?? It so happens even when doing shows outdoors when I add lots of reverbs.

Welcome!

Assuming you're taking a split of the main outs of the live-sound mixer and recording that - which removes the possibilities of incorrect effects routing....

The most likely factor IMHO is the difference between what's needed for 'live' and 'recording' mixes. (Granted that the larger the venue the closer these two will be...) The live-sound mix is sitting in the acoustics of the venue where the audience and the mixer are hearing complex combinations of direct and indirect sound, the fact that some sounds require little sound-system amplification and the interactions of the venue on the sound. Thus, a recorded live-sound mix will often sound grossly imbalanced with the vocals being as you describe - very forward and 'dry' - with some instruments hardly able to be heard and a feeling that the EQ was all over the place.

Over the years I learnt to fight hard against bands wanting "a quick recording of the live-mix". Not only were they invariably very disppointed, but also often directly or indirectly queried my competence at mixing! These days if a live recording is needed it's a combination of recording the channel direct-outs and some mics rigged specifically for the recording all to a solid-state recorder. The 'mix' - including any effects - happens back at the DAW after the event.

HTH