WLW, I'm not disagreeing on the ability to have Plans A, B or C. It's great if you have the management and team to apply it.
But our manager applied a technique 'without the players good enough to do the job', putting our club in danger of relegation. We had an 8 game run (L W W L W W D W) using a successful plan A that saw us moving up the division; when the manager decided to adopt a strategy that saw us go on an appalling 8 game run (L L L L L L W L). As the classic saying goes, a sign of madness is doing the same thing and expecting a different result; during that run nobody could predict what line up we would have and many fans, and commentators alike, could not work out any semblance of tactics or line-ups from Holloway.
This puts great doubt on the ability to apply the variability that Holloway talks about for the coming season. Again, you can talk all the theories - but the above results are fact. If you don't have the players to apply your strategy, then all good managers adopt a strategy to get the best from your players - not the worst from them (and certainly not putting your employers in the position that we were put in, which would have been a complete disaster for the club - it already makes it difficult for us to get good quality players, who will look at our position and have doubts about joining our club; had we continued our run they would see a manager who had a good team and joining a club on the up - not lucky to escape relegation - again, not quite out of the Management 101 handbook!).