Curently we have basic:
Holy exotics.
Water exotics.
Air exotics.
No fire exotic.
No ice exotic.
No light exotic.
So my idea is that we expand all the exotics to cover all fighting damage vulnerabilitys.
More basic vulnerability exotics.
become a builder and include a couple
Exotics don't cover more vulns, because all classes can use exotics. It isn't meant for every class to be easily able to hit every vuln, IMHO.
Love it when posts are created like this. 
Look harder.
Look harder.
Agreed.
Not to simply repeat what they've said but...there are actually very nice exotics for many of those...
Hehe, I know of a light one.
Keyword here is basic, i also know one that hit all vulns 
Oh yeah, and that one...eheh.
That fire vuln exotic is just nasty 