The following is my own suggestions to the new routes. If you find any one of them feasible, please help to feedback to the respective bus companies. Thank you.
Service 7

Will be separated into 2 services.
One service between Bedok interchange and Ghim Moh terminal. The route between Bedok interchange and Orchard area will be the same as the current service 7, thereafter follow service 111 route to Ghim Moh terminal.
Another one service (trunk service) between Boon Lay interchange and Marina Centre terminal, following Express 502 route entirely, except in Marina Centre, the service will plys Raffles Blvd instead of turning into Temasek Blvd and Temasek Ave.
Service 61

Will be amended to ply Toh Tuck Rd, instead of Bukit Batok East Ave 6, to replace service 77. Alternative services to Bukit Batok East Ave 6 and part of Jln Jurong Kechil are 66, 157, 174, 178, 852 and 985.
Service 77

Will be withdrawn. Toh Tuck Rd will be covered by amended service 61 mentioned above. The route between Jln Jurong Kechil and Holland Rd (up to Holland V) will be covered by service 970. The route between Holland Rd (after Holland V towards city) and Marina Centre will be covered by service 106.
Service 97

Will be integrated with Express 507. The new service 97 will ply between Boon Lay interchange and Marina Centre terminal. The route between Boon Lay interchange and Jurong East Ave 1 will follow Express 507 route, thereafter the service will plys Jurong East Central, then it will follow service 97 route to Marina Centre terminal. The new service will skip Jurong East interchange, Toh Guan Rd, Cecil St. In Marina Centre, the service will ply Raffles Blvd (towards the terminal) and Raffles Ave (from the terminal), instead of Temasek Blvd and Temasek Ave.
Service 111

Will be withdrawn, replaced by another service split from service 7.
Service Express 502

Will be withdrawn, replaced by another service split from service 7.
Service Express 507

Will be withdrawn, replaced by new service 97.