I only very occasionally play relay these days and of course it is a pain if the opps ask about every bid, but there is a flip side. Once playing a relay pair RHO showed balanced no major then 2353 then LHO signed off in 3NT. It was obvious to me, based partly on feel/tempo, that LHO had 5 spades. Sure enough he did and pard lead one. Now everyone says that "well you relay an extra round to hide this" and so on, which is true in theory but not so much in practice, especially if there is any time pressure. Now I would have liked to ask for clarification of each bid of course, but of course I couldn't.