I reckon the new Marine Parade-Braddell Heights GRC is now a safe PAP seat following the incorporation of MacPherson SMC into the GRC.
However, the trade-off is that the new East Coast GRC is now very winnable for the WP, especially because it contains the former Joo Chiat SMC, which is historically pro-opposition.
The Changi parts of East Coast have been carved out and merged with Pasir Ris but those areas were less accessible anyway and with their removal, the WP can focus their campaign on a smaller area, which in turn makes it easier to reach out to as many voters as possible.