We all know that a rebuild is needed and Big Daves lacks experience.
Obviously it isnt ideal however out the candidates linked - Smith, Johnson, McInnes, Appleton, Shakespeare, i dont think one of those has a promotion on their CV as it stands so any rebuilding they have done hasnt achieved what we want so they are no guarentees.
Out the others, Mick McCarthy has rebuilding and promotion experience but i think his style would be an issue to fans, Graham Potter does in Sweden but again would be a huge risk as thats nothing like the championship.
The advantage Big Dave has over these is that he knows half the squad, is liked and respected and so will make the transition easier (hopefully) for bedding new players in.
Also i know people say the cheap option, we have just spunked a load of money on Pulis and Pardew who were expensive options, we had cheaper options previous in Mowbray and RDM who worked out fine, of course we also had Roy who would of been expensive, we could of paid loads and got Big Sam (thankfully we didnt), its not about the cheapest or most expensive, its who the best option is, i think even our playing staff, by and large the more expensive ones have been the biggest let downs.
Maybe that Terraneo bloke looked at candidates and decided that the bloke currently there was infact the best option.
Big Dave may well be a disaster, i think we all have reservations, but i think we will all wish him well, but for those who have already decided he is a terrible appointment seems a bit OTT.