Tbh, most teams are capable of playing great football. Olympic have the ability to play it around. As do Edgy. South Cardiff play great football against the better teams, some of their games against Magic are the most memorable I've seen in the State League.

As for the pre-season training.
I do think there is a need for some fitness training. Just to get everybody's legs ticking over, getting into the swing of things. You run 95% of the game without the ball...so fitness is a huge part of the game. Though the most important part is what you do with it in that 5%, so technical ability is important in that respect. I was always a fan of doing some kind of fitness first (running between 2 ball players), getting on the ball when fatigued in a 5 a side possession, and finishing with a few sprints and then a passing exercise to cool down/keep the concentration going. Most players playing NBN in even 19s and above, have some technical ability. The touch comes naturally in passing drills and possession based games. After a few weeks, start doing tactical stuff like Attackers Vs Defenders 6 v 6 with a goalkeeper/goals with games on weekend.
Clever coaching would incorporate fitness into a technical session, e.g. ensure the possession game is fast tempo and intense.