You don't need either of your birth certificates, so you can take those out.
If you're using pension income and applying under Category E, then you don't need to include any evidence of savings, because they will not be considered and won't be looked at.
You only need 2 photos maximum - I'd go with one from the wedding and one recent.
You don't need e-tickets from your UK trip because you live together in the US. You only need to show e-tickets/boarding passes if you live in separate countries and only see each other on visits.
Same with cards - they are not needed because you live together already.
So, instead of e-tickets and cards, you need to include evidence of living together in the US. Things like annual tax returns and joint bank statements are fine. However, you'd need to show that they cover the whole time you've lived together... so instead of just one bank statement, go with 2 or 3 per year.
You can also include separately addressed documents as well - so if the utilities are in his name, you can include a couple of those, and then add a couple of things in your name from the same time period (i.e. phone bills, doctor's letters, DMV letters etc.).