Hi Micam,
Let's address your questions in order.
1. Will my EF improve? It will probably not improve. There is sometimes some improvement in EF after an MI, but not 2-3 years afterward.
2. Is 25% cause for concern? At this point it boils down to risk factor modification. You need to reduce your risk of future problems as much as possible. The hardest one for people to comply with is NO SMOKING. Smoking is more dangerous if you have known coronary heart disease.
You should be on certain medications that are shown to decrease your risk of future events: beta blockers, ACEI, aspirin, aldactone if you have heart failure symptoms. Unless you have a contraindication, you should be on the highest dose of a statin that you can tolerate. I am refraining from using industry names of medications, of course we all have our preferences.
If you have an ejection fraction less than 30% and have had a heart attack, you should have an implantable defibrillator. They save lives!
3. Could my EF slide further despite the meds and exercise? It could, but if it does, you doctor should look for the reason why. It may suggest there are more blockages.
Your medications look good. I would increase the dose of carvedilol as much as you can tolerate and increase the dose of lipator (atorvastatin) as close to 80 as possible. All medication changes under the supervision of your doctor of coarse.
Look into an implantable cardiac defibrillator. It sounds like you are a candidate.
I think I already answered your 4th question above.
Good luck and thanks for posting.