So Republicans will get 37% of the Hispanic vote instead of 35%
Yay!!!!!
Let's say you have 8 Hispanics who vote Democrat and 2 Hispanics who vote Republican. Let's say you get 2 Hispanics who vote Democrat to vote Republican. You now have 6 Hispanic Democrats and 4 Hispanic Republicans. It's still 6 Democrats to 4 Republicans. If you get 5-5 it's still a wash. All the while millions are still coming over the border and will vote Democrat for decades.
Of course Republicans should welcome Hispanics but it's unlikely there's going to be a major shift. There will be movement along the margins which can change results in local elections.
Regardless of how many Hispanics change party every poll shows they overwhelmingly vote Democrat. Pandering by altering core beliefs is like drinking salt water when you're thirsty.
The Karl Rove belief 'Hispanics are natural-born Conservatives' has always been a talking-point fantasy.