Well the phase 3 concept is to break out the fight with Thanos over 2 Avengers movies, so I imagine that is indeed going to be huge.  As far as the inconsequential other guys I agree with you.  With the exception of Guardians (since they are currently in their own little world), everything that happened in the other movies wasn't a huge enough deal happening on a grand enough stage for others to get involved.  That sits directly on the enemies themselves.  In Ironman 3, could you imagine if Stark did call Thor?  It would probably go something like this:

Stark: Hey Thor, how is Jane?  Listen, I have this guy who is running this company and I actually think he is doing something bad.  Can you come help me out?  He is hanging on a freighter.

Thor: Company?  Freighter?

Stark: Yea.  Guy is using a lot of money to secretly inject people with this stuff that makes them super-strong.  Also, he is hanging out on a boat and may or may not have kidnapped the President 10 minutes ago.  I am still waiting on intel on that last part, but I figure I will know by the time I get there I am 5 minutes out or so.

Thor: Ummm... I am dealing with a Dark Elf in Asgard right now, can I call you back?

Stark: Dark Elf?  Like WoW?

Thor hangs up.

In Thor 2 they were in London fighting the elves for all of like 10 minutes.  Stark couldn't fly there fast enough in his armor to help out, nor could SHIELD in their triskellion. 

In Cap 2 replace company with assassin and super-strength with I don't know why and you have the same conversation as above.

You basically just want every movie to be an avengers movie. Let each hero have its spotlight once in a while and dont sweat the details. Its entertainment, not real life.

I get where you're coming from. Logically, it makes no sense to do that. But to keep a story alive. These type of restrictions have to be done. Because, if you really want to go with the logic. Than Spider-Man can call 9 people at a whim and own his villains. Just the top off of my head, Parker could easily contact: The Fantastic Four, Daredevil, She-Hulk, and a ton of Avengers that are mostly free (Wonder Man, Iron Fist, Squirl Girl, Vision etc.). Second, it's not done because, what happened with Spider-Man 3. Too many people, not enough time.

Now imagine lots of villains, lots of heroes. No time for the characters bits. That's why Avengers does what it does. It's for that portion. While the character bits are saved for their solo movies. Just assume when Cap 2 is going on. Everyone is doing something. Infact, when Iron Man 2 was happening. Incredible Hulk was happening at the same time. Some of the movies don't even follow chronological releases. It's just like how Batman's death could of been dealt with faster, if they called Superman or Wonder Woman for a favor. That spoils so many stories. They could write in scenes where the character does call people. But everyone turns them down. But that than just wastes the movie budget. With Iron Man, it could be a funny bit with JARVIS. Where he says: "I've already called everyone. No one got back."

Yeah, the world doesn't feel connected. I hope that DC won't make the same mistake. Imagine how great it would be to see what Batman was up to during the MoS carnage.

Welcome to comic books.

Iron Man 3 - What the hell is this shit?
Thor 2 - What the hell is this shit?
Cap 2 - Decent but forgettable. I honestly can't remember much from this movie.
GOTG - Excellent. Loved the movie very much.

You didnt like Cap 2? Thats a first lol

A first? You living under a rock?

The Whole supehero movie overload is horrible. Sure there's some great movies in there like Iron Man, Batman and X-Men, but the vast majority are corny, cliched , cash grabs.

Haha no Im just saying its a first because a lot of people love The Winter Soldier.