I just don't see why if someone is a resounding success in a position, eg bairstow at 7, root at 4 and, yes, bell at 5, you move them. Take a player who struts out to bat in a position they have a lot of success at and sow seeds of doubt as to whether they can perform higher up the order. Tendulkar didn't move, nor did steve waugh, they didn't do too badly.
Moving even one position is a huge change, yet we're sprinkling players around like confetti. Never as simple as being good in one position natyrally following that they are good elsewhere. Way too many variables and elite sport is huge psychologically.
Batting 3 is a very difficult position, takes a certain type of player. Nothing ive seen suggest Ballance or jennings or westley are long term answers. Root doesn't want to bat there. Fact is we've been spoilt having a top four of strauss, cook, root and KP... the cupboard seems bare...