The Tripoli doesn’t have a well deck. The Marines were going the direction you said, but have reversed course. The remaining America class LHA’s will have a well deck, with reduced aviation capability. Of course, we won’t be landing Marines from helicopters OR amphibious craft unless the beach is already secured for that mission (friendly ground or air and/or coastal defenses destroyed). Very few countries are willing to take the losses of an opposed amphibious landing for anything less than an existential threat.
The last big deck amphib I was on that didn’t have a well deck was USS New Orleans, now razorblades.