Offensively, it seems like the teams are all doing variations of the west coast offense. Large wide receivers. Pass to setup the run. Fullback/halfback back field.
There is nothing wrong with that, but I think there are advantages to being different, especially in the draft. If you can develop a viable system that uses other types of personnel, it gives you an advantage over other teams who aren't used to defending against it.
The 49ers are trying this with a run first team, but unfortunately defenses are good enough against the run, that I doubt that a team will have great offensive success by being primarily run-oriented.
Anyway, here is a type of offense that I would love to see in the NFL. 4 WR, ace back set. But here are the personnel:
ace back - quick/shifty back, ideally someone like Barry Sanders, or in today's NFL, Reggie Bush
2 WR - small, quick WR. Not in the mold of a west coast receiver, but more in the mold of Steve Smith.
2 WR/TE - Here, I am envisioning 2 players like Delanie Walker. Undersized for a TE, but oversized for a WR. They can help out in blocking as needed (but they aren't that good at it), and also go out for passes.
The ace back won't be expected to run for a first down on 3rd and 1 too much. The ace back is there to punish defenses that want to stay in nickel or dime defense all day. The ace back is also responsible to help with blocking.
2 WR - Takes advantage of their small size to run routes that the bigger CBs have difficulty adjusting to. They are also very fast, so provide a home run threat.
2 WR/TE - Also run a lot of routes, but may also be called in to pass protect at times as well. They can also be shifted before the snap to act as a fullback lead-block for the running back.
This offensive scheme requires a good QB and pass-blocking OL. Ideally the QB can also run with the ball, but accuracy is more important than running, since this offense will be passing the ball at least 70% of the time.
From a draft perspective, this team would be able to get value picks for all 4 of their WR. WR/TE tweeners are not that popular in the NFL, nor are small/fast WR. RB could also be a value pick, but elite backs that are also big enough to pass block well would also be attractive.
This offensive-scheme would also work well with a no-huddle offense, as few situational substitutions are needed.