Red Lobster CEO Kelli Valade is resigning after just eight months at the helm of the Orlando-based seafood chain, a quick departure that one industry analyst called “very, very, very bad.” A news release announcing Valade’s resignation did not give a specific reason for her departure, which she called “an incredibly difficult, but necessary, decision.” It is effective April 15. “We’ve accomplished a lot in a short period of time, including building a great leadership team that alongside the board will carry the business forward to achieve our vision,” Valade said in the release. Valade took ov…