There's certainly a possibility that some parts of New England are close to some English regional accents 300 or so years ago. But only some.
When Shakespeare rhymed "found" or "ground" with "wound" (as in an injury, pronounced woond) all the "ound" word endings were probably pronounced "ow-nd". Shakespeare himself probably sounded quite a bit like the modern Birmingham (West Midlands, not Alabama) accent. Or should I say Brummagem?
Accents and dialect can and do change drastically over 40 miles in England. Even the Danelaw still has an impact. And as George bernard Shaw said, an English person only has to hear another English person speak a single sentence to get a very good idea of their class, educational level, whether they went to a public (which means private) school or not and where they come from.
As for spelling, that only became standardised relatively recently. And the English called the autumn "fall" until the posh fashion for Frenchifying in the 18th century.
The grate fing abart English is yoo the grammar and spelling scramble can but unnerstud still be. As proves, Yoda does. Try doing that in French or German. :-)