As you should know, "free upgrades" is a sales gimmick in most cases. So you book an 8A cabin and get "upgraded" to an 8C (in virtually all cases, you will not be upgraded to a suite). All standard outside (and inside) cabins, regardless of category, are essentially identical. The cabins are no different as far as size and amenities - you have moved up to a higher deck and the only real benefit is a reduced travel distance to the buffet restaurant and pools. So if you want to be on the lido deck and just a few steps away from the pool then I'd say fine, go ahead and make the booking.