I'll happily welcome any manager who's going to come in with a plan and the intention of playing attacking, front-foot football, as it'll be a relief after the horrific football we had to watch last season.
The fact that his approach and priorities don't differ much from Martinez' is a significant drawback, however. Silva could put himself at a huge advantage from the start by studying Martinez' failures here and seeking to avoid making the same mistakes with regards to defending and play off the ball, but I suppose these managers are insanely cocksure and this fella has been given almost no reason to believe his past approach won't continue to advance him in the game, even when it fails.
I expect the defensive side of the game to be neglected and him to be gone within 2 years, either to a bigger club after some short-term success, to eventually be found out, or booted before picking up a cushy national job while we continue to pay him. Hopefully it's the former.