^ Not a fan of sweater vests personally (not a rule, I just don't care for them personally) so I don't think I have the expertise to comment. I think all three of the ties you purchased are actually pretty decent. I'd return all of the pocket squares (really don't like any of them) and the sport coat (focus on decent tweed for F/W and linen for summer (I prefer cream, browns and blues)).
^ In terms of color, the navy blazer is fine. I don't care for flapped patch pockets on a blazer, but otherwise it is fine. The color of the tweed jacket is fine too, though I am bothered by the fact that it appears to have two different sized herringbone patterns. A jacket in that color range, however, is a good idea. You are getting the right idea with those two jackets; you just need to refine some of the details. Also make sure you are trying these on and that they fit you well.
L2B, I think you would most benefit from editing rather than acquiring more. For your stated needs, I think you have plenty already. Of course, all of this assumes that what you have fits you well. If that is not the case, then your first cull should be anything that doesn't fit and is unlikely to benefit from alterations.
Your tie collection seems all over the place. Can you pick your favorite 10-20 of those and let us consider them as a group? This would help us get a sense of your preferences.
Jacket? I struggle with lighter jackets. They are a bit tougher than darker ones. Which isn't to say you shouldn't own one.
I can only agree with Claghorn here, it seems that you collection of SCs generally consist of lighter jackets. While I agree that lighter jackets/darker trousers work (hey, I hosted a FC around that topic just to prove this point), darker jackets are pretty much the staple of any wardrobe. So this would be the main thing I would try and address when you are culling and/or expanding your wardrobe. Go for more darker jackets, navy blazers with different cloths (hopsack, flannel, linnen etc...) are all extremely versatile and pair up with pretty much anything. Same with dark brown.
Also, try to avoid too many patterned jackets, they generally look great when you are browsing eBay but are usually hard to pair with a lot of other things. The patterned jackets I have inevitable get worn with the same accessories over and over again, simply because they only go with a few things I have in my wardrobe.
My favourite odd jackets consist of a navy mohair blazer, a brown donegal and two grey herringbone jackets, they get by far most use of the things I have in my wardrobe. They are all solid, but have some surface texture that make them a little more interesting than your run of the mill worsted jackets. The same goes with suits, the patterned suits always looks best when you go shopping (I have like five PoW suits, so I know), but I always keep coming back to my plain grey and navy birdseye suits. Again, some texture and subtle pattern to make them more interesting, but for all practical purposes solid from more than about 10cm away. Goes with everything.......