It's funny, as just a few posts before yours we were being told that Kronke will make the decision to sell Sanchez, & that Wenger is only a puppet.
As Arsenal fans, we always thought Wenger had a bit too much power, & neded people around to helphim, but to also challenge him more. We have Gazidas & Dick Law, but not much else. We have made steps to try & address some issues, Huss Fahmy from Team Sky has been hired to help with regards player contracts, & we have a new Director of Performance in Darren Burgess, so it looks like we are trying to share / dilute Wenger's workload / influence, Jens Lehmen brought in as new first team coach.
Ultimately, i would think you do want the manager to have the final say on most matters, otherwise you have players getting signed that he didn't want, players getting sold he wanted to keep etc (within reason of course). He just needs to be pushed more, & be held more accountable in my opinion.
Spurs are where we were before the stadium build. We had built a very good team, & were hoping the stadium build would push us on. The reality is that Chelsea & Man City got new owners that changed the landscape. We struggled to afford top new players, we stopped winning, our existing top players wanted to win, & get paid better while they were at it. Seemed a bit of a cycle for a good 10 years. We started to pay the squad a lot better as a way to try & keep players & build. Unfortunately, most never quite lived up to the hype, but are on good contracts, so we are struggling to shift them on. However, given the strength of the premiership now, we've never managed to get back to where we were pre stadium build.
In a way, the stadium build has came at the worst time for them. They are on the cusp, but can't really afford to push on. Their players are now highly rated, but they still don't pay the wages of the top clubs. They have never had a better season in decades, yet players soon have had their head turned. Already, some are away & want away. They now have to go into the new season playing at Wembley, so will struggle to match last years performance. The cycle is all too familiar to Arsenal fans.
Sorry to go so far off topic, these should probably be in the General Arsenal or Spurs threads.