Good q. I don't think it does appreciably, but I don't know that for sure. Estradiol definitely impacts arterial function somewhat though and can improve vasodilation to a point (which could improve blood pressure):
For example, they have long known that it helps in women:http://www.ncbi.nlm.nih.gov/pubmed/22878703
"Ophthalmic artery vasodilation after intranasal estradiol use in postmenopausal women"
However, the same effect was found to hold in men as well:http://www.ncbi.nlm.nih.gov/pubmed/11207631
"Oestradiol improves arterial endothelial function in healthy men receiving testosterone"
"Oestradiol produced a dose-dependent increase in plasma oestradiol (at 1 month 96 +/- 7, 149 +/- 6, 192 +/- 23 pmol/l in the 3 groups, respectively, P < 0.001 by ANOVA for trend). Minor side-effects (gynaecomastia, nipple tenderness) indicated that 20 mg oestradiol was the maximum tolerated dose
. There was also a dose-dependent increase in FMD with oestradiol dose
: at 1 month"
So it looks like estradiol will help blood flow (and blood pressure) in men, but becomes unhealthy in other tissues when you get too high of a dosage. This is not secret of course.
Now, in your case, your estradiol is lowish, so I don't think this really applies to you. You were probably around 15, for example, during your low testosterone days. Talk to your doc...