Making bitcoin more user friendly will go a long way in encouraging the Mexicans, and other nationals to adopt bitcoin for remittances. However, the Feds won't let that happen without a fight.
You can be sure that regulations will be put in place to discourage mass adoption of Bitcoin. But in the end, it's the will of the people that always prevail.
Come one, man. The Feds don't give a fuck about Bitcoin. If they did they'd approve the Winklevoss ETF. Besides, Bitcoin doesn't have to appear mainstream for immigrants to use it to send money to their family...they just need to know (1) that bitcoin is a cheaper option, (2) that something like Coinbase is an easy way to receive transmit the money, and (3) the risk associated with keeping fiat in Bitcoin for a long period of time.
You and I can't make bitcoin more user friendly than it is. What's more friendly than connecting a checking account to Coinbase...sending your funds to whatever wallet via coinbase...and then having the recipient redeem the funds to their local checking account?