Taking a quick look at your team, you need to balance out your positions. Personally, I like to have at least 6 CBs. You currently only have 3. You certainly don't need to have 2 punters and 2 kickers, so I would cut your weaker punter and your weaker kicker. You don't need 8 WRs, so I would cut Joe Moran and Robert Teel. Cut RB Paul Harris because he is way too slow. Replace those 5 guys with guys from the free agency. Grab the 3 best CBs with at least 70 speed (60 is fine too but not ideal), and grab the 2 best SLBs with at least 50 speed.
In the public suggestion forum, I drafted a suggested speed for each position and it is pretty relevant in determining the minimum speed each player should have at each position. I believe speed is king, and you must have fast players at speed positions.
Below is what I have as suggested speeds at each position (minimum to maximum). They can be lower than their suggested slowest speeds but ideally they'll be within those speed ranges. If you ever encounter two players with near identical ratings, you should almost always take the guy with faster speed.
QB: 0-100
HB: 70-100
FB: 50-80
WR: 70-100
TE: 50-80
OL: 0-70
LB: 50-80
DL: 10-80
DB: 70-100
K: 0-70
When it comes to gameplanning, I would take a look at the plays you are selecting on offense and defense. I generally remove any offensive plays that result in 4 or less yards over 6 games. On defense, I try to replace plays that give up 8 or more yards per play. You should take a look at your defensive plays, and try to balance it out. By that I mean, you get 30 plays to choose from. I would pick 2-3 Goal Line plays, 10 Normal, 10 Nickel, 5 Dime, 2-3 Quarter. Mix it up with both blitzes and non-blitz plays. Test it out, see what works, and make changes from there.
Take a look at the guides Norm and I wrote, they should definitely put you on the path to success if you follow them.
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