You are very brave to dive into this.
Well I'll try to keep up.
First, on the top of my head, anything to like tide of iron cept using reach weapons?
There are some feats that work with polearm pushes and slides. Put there isn't an at-will that pushes like tide of iron. There is a fighter At-Will that pulls, and doesn't depend on a particular weapon or shield so could be used with a polearm.
More detail on animal companions, yes, please.
There are a number of animal types, like Lizard, Hawk, etc. Now if that lizard is a crocodile or a salamander is up to the player depending on their character background. All lizards are treated the same, their defenses, attack values and the like are based on X+Ranger's Level. Where X is a number depending on the defense and animal template.
There are various things you can get your companion to do and these that various actions some of which you can combine with a similar action by yourt character (remember the problem with economy of actions I think they have solved it). Getting the beast to attack is a standard action (so no standard action for you). Move is a move action (but you can move at the same time).
Some Ranger powers have the Beast keyword (see above) and allow you to act in concert with your beast to do different things and some do (B) damage where B is the creatures damage value, rather than (W).
Also, is there a lot more pushing and pulling and dropping prone stuff in there?
I've only really looked through the first through fighter powers in any detail, but there does seem to be a lot of pushing, sliding pulling knocking prone and shifting type powers.