CCV (as with most dive ops), requests that if you have the "gift of air"- that is... you can turn one tank into a 1.5 hr excursion- that you should be mindful of your fellow divers awaiting your return topside, bouncing at anchor. My recollection is that they ask your 1st tank off of any boat dive to be limited to 1 hour maximum. (If it's an idyllic flat calm warm day no one will begrudge you a 1:15 dive)
In that your profiles are fairly shallow, you'll have to manage your own issues about the surface interval. Remember, the guys topside have started theirs while you were still grinning at that critter. By deffinition, you were probably pretty shallow, just under the boat's 25fsw (standard) mooring pin. Most of the life in Roatan is above 45fsw anyway.
You'll have plenty of time (at least at CCV) to dawdle on the second tank as you get to make your return via the shore exit.
No one checks your SPG for remaining compressed air. This will make more sense after you've seen it, but it is no problem for the medium-advanced diver to leave the Prince Albert Wreck at 800 psi and safely make it ashore with plenty of air remaining. It is not uncommon for some shore divers to take 2 hour "walks in the front yard", just ask "Dee".
There are "sand checkers", the ones who descend past 80' looking for the next sand ledge at 130 then 180... is the sand still there? 230'? Just checking. People get bent in Roatan mostly by doing dumb stuff.
I haven't been to Kona in years, but I recall it was drift and recovery diving. If I was DM I might set certain minimums for those conditions as well, building in a safety margin. The South side of Roatan is pretty much so a swimming pool with pretty fish. Like any dive in any water- Nature will apply Darwin's Theory as necessary- it's just that you really got to need it down Roatan way before that happens.