One of the things I like about it is that I can often use the SS as a DE (similar to how some teams use an OLB as a DE). You obviously need one heck of an SS, as he'll be doing just about everything (rush, coverage...). The player next to him has the job of occupying the OT so the SS can make the play. (Or the OLB on the respective side opposite the field)
The "Eagle" defense uses a linebacker in place of the nose tackle for a speed rush up the middle, but it looks like you are trying to do that on the edges. The graphic above has many players stunting inside. I'm not sure if that is a good idea, as it takes players more time to get in position before they can react to the play. If DE2 covers his A gap, then OL1 can cover the B gap against the run. That leaves the SA2 to either drop into a short zone or blitz. If IL2 protects the edge, OL1 could blitz through the B gap, drop into the short zone, or Read and SA2 is available to cover the flat.
The alignment itself is how the 6-2 formation is set up. The 6-2 has E T G G T E on the line with the linebackers lined up the same way (on the OT or over the B gap). It is used mainly in short yardage situations or in high school against teams that run almost exclusively.
Having the linebackers at the line, as this formation does, is something that some college teams do to press, but the defensive tackle is generally on the nose and the safety is at linebacker depth or deeper.
Have you tried this as a 4-3 with just the OL2 and the SA2 up? That would give you more size on the line, but it would require a position change from a team that is set up for the 3-4. On the other hand, you can use what you have as a defensive audible in the game from the 3-4 and it would move the players up to show blitz or press. If that is the case, it may be better to bring the OL2 up to the line rather than the IL2 to keep the linebacks from running into each other when changing the look.
Against the dive up the middle, maybe it was just the personnel or something, but having either the DT and DE or the ILB and OLB crash the "A" gaps would stuff the FB dive.
The dive will almost certainly not work with both linebackers going inside, but then there is more vulnerability to the sweep, stretch, or screen, and the quick slant or skinny post are almost a given. The TE can just run a curl or seam route for big yardage if no one covers him Man or is allowed into a vacated zone. That assumes the DE1 and IL2 are playing the edge against the run rather than covering the TE.
I did get some inspiration from the 46, but I was a little wary of an unbalanced formation, though.
One thing I brought up from time to time in beta was that the game needed to have strong and weak side designations for plays. Without them, it is hard to set up the "46" to work as it should. I did get a modified "46" to work, and there are some other community members who have looked at it as well, but having strong and weak sides would make things easier.