Give me the profiles of the 2 previous dives, surface intervals, tanks size, gas mix and your SAC .... and I will put together few alternatives for you in 2 minutes
It was a somewhat rhetorical question, meant to illustrate that the current common planning practice amongst computer divers is woefully insufficient. Your software is a step in the right direction - but ultimately, I'm quite certain that many won't bother and will continue with the "jump in and let the computer sort it out" paradigm.
I know how I'd make that dive and like your methodology, it's a plan that I can put together in 2 minutes or less. That method requires additional training and knowledge beyond what is currently taught at the OW level (by the vast majority of instructors, at least) - yours requires additional software and hardware. Both will work fine, but only if the diver takes it upon themselves to do so. There are even other approaches that would be successful. We don't need to debate the merits of which approach may be better, but we can certainly agree that a planned dive is vastly superior to an unplanned dive.
I suppose the OP's original question struck a chord with me and sent me off on a tangent - we've substituted the use of computers for proper dive planning, and that's a horribly dangerous road we've set ourselves on. We now have relatively inexperienced divers believing that dives can no longer safely be accomplished without a dive computer, yet they don't know the basic elements of dive planning. We have other experienced divers believing that the only path to maximum bottom time enlightenment is through the sacred dive computer, yet still dive profiles that ensure they run out of gas far before they approach their no-deco limits. The use of tables is being relegated to a stone-age practice that is being actively discouraged by those promoting computer use, and we continue to see agencies moving farther and farther away from teaching this basic skill. Mental engagement in diving is becoming a thing of the past, and that can't possibly be good.
My question was meant to illustrate that once certain goals are imposed on a dive, dive-planning becomes a necessity if success is to be expected. And isn't that the point? When I dive, I have certain things I want to accomplish underwater. I want a nice, long dive. I want to use all the gas I paid for (and can use safely). And I want to see certain choice features of the selected dive site. I need a plan that allows me to accomplish all those goals; I don't want to leave it to chance and I can't afford to leave it to chance.
We've got to bring proper dive planning back into the mainstream...