Well, im not all that good myself, but the things I noticed were:
- Work on combos, since you lose some damage and can get punished if you drop combos and whiff a move.
- Don't try to reload in neutral and only after a knock-down with 66C or 214A/214B, since it can get punished by supers or characters with fast dashes.
Edit: Any EU Eltnum players interested in getting a Eltnum lobby going sometime this weekend?