I think saying people don't know what Islands of Adventure, is a reason to not expand. Ask those same people if they know there is a Harry Potter land in Universal and I think 75% of them would say yes. Islands of Adventure as a name is not well known, but what is in there is. Even after people visit this may still be the case. you would be amazed at what people forget when it comes to names. Heck we were all talking about the waffle sandwich place in MK and someone had to point out to us the name. So we had all been there probably a dozen times or more, yet couldn't remember the name. And we are seasoned theme park travelers. Think of the average guest that comes once every couple years to Orlando. My one nurses husband couldn't answer the question of where the monorail went, he said AK
He has been to all the parks several times.
*IF* Uni truly wants to compete with Disney and they have the goals in attendance numbers, they NEED more hotels, more shopping, and more things to do ON PROPERTY. So I think a third gate is logical. Now I was saying I don't think it will happen because of land. But if they buy land further away and build a monorail type transportation system, it could work. But that is a TON of money and I am not sure if they could really pull that off. Time will tell. But they need more if they want the numbers Disney has, there is no doubt about it. Their parks can easily be done in three days max. Heck two days really. So they need more to attract people to stay longer on property. A water park would be a good start as that would add another day to people's vacations. More hotels to get more guests staying on property would also be a good start. Then add more unique shopping. Finally, add the third gate and then more hotels. If they can do all this and find a way to connect it all together, they could start to really hit Disney and I don't think Disney can really hit back enough to stop it or turn it around.