It's possible new investors can be enthusiastic, rather than concerned, with the change. A startup without a founder who's not aligned with the new strategy is

It's possible new investors can be enthusiastic, rather than concerned, with the change. A startup without a founder who's not aligned with the new strategy is stronger than one who has someone around "just because" (which can imply an inability to make decisions). danbmil99's suggestion of touching base with the existing investors is a good one. They could actually help explain this to new prospects. People who've already met you may not be as enthusiastic about this change as completely new investors, to whom you'll merely be an artifact history, just like the previous strategy.