Although the Dinosaur token enters the battlefield attacking, it was never declared as an attacking creature (for the purposes of abilities that trigger whenever a creature attacks, for example)
Swarmyard a good land for protecting your squirrel commander, while Bloomburrow gave us Oakhollow Village for additional +1/+1 counters and Mudflat Village for some recursion
Its downside is that it cannot answer expensive things well, and you need to be multi-coloured to take advantage of it, but in both Modern and Legacy that isnt an issue as expensive cards arent played as much and most decks are naturally multi-coloured due to the manabases available in these formats
The back half, Itlimoc, Cradle of the Sun, taps for green mana equal to your creature count, which is exactly what Gaeas Cradle does
You can sacrifice a weak Rat to get the token generation going, as once the ability is used once it'll progressively get stronger as more Rats are put into play