Something to consider as new divers - Cayman diving is DEEP. Most of the walls start around 100'+ and in some case the moorings are at about 50-60' and chosen in barren locations so as not to damage the reef.So hanging around the mooring is boring.
Standard dive profiles are 1st dive to 100' on a wall/pinnacle, 2nd dive shallower.
So if you're not willing to go deep - and as new divers burn thru your air quickly - they'll assign a DM to shepherd you around shallow. But at sites like Big Tunnels that mostly means hanging in blue water waiting for something to pass by - which often happens...
I was surprised by your characterization of Grand Cayman's dive sites as being so deep and statement that the walls start at 100'+ feet.
We've done at least 8 trips to the Caymans, including an Aggressor liveaboard trip and several 2 week trips, and I've never been struck by the depth of the dives as compared to other Caribbean locations. But I could be faulty in my memory, and in more recent years we have mostly done shore dives on Grand Cayman while we also spend time doing "vacation stuff" (and maybe a few boat dives, too) and then we travel to one of the sister islands of Brac or Little to spend the second week diving.
I wondered "have I forgotten how deep the walls really are around GC?" I checked my log books and there are a lot of shallow and medium depth dives and some in the 100 foot range, but I only record the max depth in my log book - and my memory is that many sites offered a range of good diving at multiple depths.
So I also reviewed the iDive site that
@drrich2 referenced in his Cayman Aggressor trip report (see link below) and confirmed my impression that there are very many dive sites around GC and most of them offer options in the shallow to mid-depth range. There are some deeper dives but they are less common.
I didn't review all the sites - there's too many - but I randomly selected quite a few of them - some that I remember diving and others that were unfamiliar. I looked at sites on the north, south, west, and east sides of the islands and concluded that "I do not agree with your assertion that GC diving is too deep to be comfortable or valuable for newer divers" in comparison to other popular Caribbean and Central American dive destinations
Best Dive Sites Grand Cayman - iDive
But I could be mistaken and I'd really like to hear the opinions of others. I would be less likely to recommend GC to newer divers if the diving may be too deep. There are some GC dive professionals on SB like
@FindingMenno and
@caydiver, as well as other divers that are frequent visitors or property owners on GC, like
@EastEndDiver,
@mi000ke,
@Trailboss123 and many others. So I would be interested to also hear their opinions about GC as a dive destination for newer divers, especially because we seem to have different definitions of "too deep".
However, if someone is looking for great shallow dives, then Little Cayman is still the best option among the Cayman Islands IMO - but there's not much else to do on LC besides eat, sleep, dive, relax, and enjoy nature; and there is an extra (short) flight on a small plane to get to LC for a land-based trip.