Well I have made my position very clear that any opinions should be based on the actual science of animal welfare rather than emotion and/or propaganda from various animal-rights pressure groups.
I certainly have no problem with bottlenose dolphins in captivity in appropriate accommodation they do very well the majority in the US and mainland Europe captive bred. Likewise with the other species you list but again this is down to the suitably of the accommodation and care provided.
Certainly there are serious issues regarding Lolita. I haven't actually been and seen the pool she is in but neither I suspect have you. The video I have seen of her health care seems to demonstrate that the staff there take her welfare quite seriously.
YouTube - Miami Seaquarium Husbandry Behaviors for Orcas and Dolphins
This animal has been at the Seaquairium for 40 years (she was caught in 1970 age approx 6 years). Reading some of the information from the various anti-captive groups they appear to still wish to remove her and try and release her back to the wild. One would have thought after the tragic farce involving Keiko they would have learned their lesson.
Keiko the killer whale
But these people always seem to put ideology above actual animal welfare. Moving Loita somewhere else with other whales could be an option but there have been serious doubts as to whether she would survive such a transfer and also if she could adapt to being with other whales, she has been on her own for 30+ since the death of the male Hugo.
The Miami Seaquarium is a very old facility and certainly appears to require considerable ongoing investment but this could be said of any number of zoos and aquariums. I think it is very doubtful that they would consider keeping orcas in the future when Loita dies which is possibly why they never commited the investment in a new orca pool. Although such a pool could be use for dolphins at a later date. I am thinking about marine parks such as Marineland in France who now use their old orca pool for dolphins.
For the record at the at Seaquarium only one of 24 bottlenose dolphins were wild caught (in 1971) and the rest where born in captivity. The three white-sided dolphins were wild caught (1988, 1988, 1993) but they have had a successful birth in May 2009.
So as a facility they can't be as direr as some paint but that also doesn’t mean that the conditions for Loita represent any currently considered suitable environment for a captive orca either and shouldn’t be used as a basis for decimating against all aquaria that hold cetaceans which appears to be the case.