We go every year to both parks, we of course spend much more time in WDW than we do Universal but we got to both.
When the girls were younger we didn't go to IOA because they couldn't enjoy the rides. Now that they are getting older we do both parks.
Universal is an awesome park for full family rides. We are big movie watchers and we love being able to "ride the movies". The kids all love it
IOA is rated one of the best adventure parks in the United States, it didn't get rating for nothing. It blows Disney away for thrill rides. BUT Disney isn't about Thirll Rides... They are totally different parks with different objectives and ways of getting people there and making them happy.
VERY DIFFERENT PARKS.
Another thing is we ALWAYS do Universals Horror Nights...this is by far the best Halloween party I've ever been to. It is amazing how they put that together. By far one of our best experiences.
Now with that said. Universal is no Disney. We spend 2 days of our 12 at Universal. Our hearts lay with Disney. We love the atmosphere and everything else there is that comes with Disney.
We do not go there for thrills and chills, we go there to experience a place where time stands still and we as a family just enjoy it.
You really shouldn't bash Universal, they are competitors and that is it. Both places offer different things and none should discounted.
Go and try it out, but go with an open mind and know that it's not Disney. it's Universal, you may enjoy yourself.