HEA, Definitely. F! Is very outdated compared to HEA, IMO.
If you stayed in HS and wanted to see SW fireworks, you would have to leave F! early and hoof it and try to squeeze in a space as they start. The cms direct traffic toward the exit so I don't know how close you would be.
We saw F! a few months ago, left early (as the big boat started coming with all the characters) and made it to the fireworks right as they started. We weren't staying for them that night so we left but you could see some from in front of the exit. Nowhere near as great as the view from the SW dessert party! That whole experience was awesome.