Of course a clock start changes approval chances - it means that Anavex was able to answer the LoQs in an acceptably complete manner.
No--AVXL answering the LoQ does not mean that the answers are complete or acceptable in the CHMP's opinion or are otherwise satisfactory because it will be reviewing the responses for two additional months up to day 180. You are still shooting blanks regarding a basis for your potential changes in your regulatory approval assessment.