Done.

Just leaving a note to update Tatoeba - the senses have changed. Tatoeba is currently not responding.

Yes, all the examples I can find of sense 1 are "vs".

How about this?
As far as I can tell, sense 1 is [vs] without exception.
I don't think there should be an separate "exciting" sense because the feeling described here is the same whether you're nervous or excited - it's about being on edge.
You wouldn't use はらはら to describe the excitement a child feels upon being told he's going to Disneyland.

@@ -12,0 +13 @@
+<pos>&vs;</pos>
@@ -14,2 +14,0 @@
-<pos>&adv-to;</pos>
-<pos>&vs;</pos>
@@ -17,3 +16,5 @@
-<gloss>feeling anxious</gloss>
-<gloss>feeling nervous</gloss>
-<gloss>being kept in suspense</gloss>
+<gloss>to feel anxious</gloss>
+<gloss>to feel nervous</gloss>
+<gloss>to be kept in suspense</gloss>
+<gloss>to feel excited</gloss>
+<gloss>to feel thrilled</gloss>

Daijr sense 1: ことの成り行きを心配して気をもむさま。 「 −しながらサーカスを見る」
ルミナス: (興奮させるような) exciting; (スリル満点の) thrilling.
Tanaka corpus: I sat watching an exciting game on television. / It was a really exciting baseball game. / It was an adventure going down the river on a raft. / etc. etc.

I think the old "exciting; thrilling" sense is needed, either as part of sense 1 or in its own sense. 心配 can mean "suspense" and I think 成り行きを心配して気 needs to be seen in that context. 8 of the 11 Tanaka sentences using はらはら are about being excited; not necessarily anxious.