So far as I remember, there are no exciting prospects when diving in the lake at Daylight Hole.
Take your expertise to Ding Dong - lots of opportunities there, and not ridiculously deep. Lots of flooded levels which eventually come back into air.
I know this because in times of extended drought (we haven't had any for quite a few years) some of the passages are accessible by non-divers. Some incredible workings are accessed by these, well on the way under the road towards B30 for example.
The best way in is through the 'trespass' site (a legal wrangle by 2 mining companies in the early 20th century led to one taking the other to court for trespass), usually this is flooded but does go back into air.
The finest workers in stone are not copper or steel tools, but the gentle touches of air and water working at their leisure with a liberal allowance of time.
Henry David Thoreau