Yes, sending feedback through the official Apple feedback channel to provide feedback and requests to restore SyncServices and local USB/Wi-Fi syncing to OS X Mavericks and iTunes is more effective through Mac OS X Product Feedback at http://www.apple.com/feedback/macosx.html or the similar iTunes feedback channel.
That said, notice a pattern happening even if SyncServices might eventually return to Mac OS X 10.9.x Mavericks and beyond. Countdown 4..3..2..
One by one what syncs via SyncServices seems to be shrinking. It's subtle, but the About SyncServices seems to be showing the countdown. Syncing Notes is just as important as Contacts and Calendars for many users. I'm not sure how many people with OS X 10.7.x Lion use or will miss syncing Mail Setting and Bookmarks.
About SyncServices http://support.apple.com/kb/HT5847
OS X Mountain Lion and earlier
SyncServices is included as a framework in OS X Mountain Lion and earlier. It is used to synchronize the following data:
1) Contacts, Calendars, Notes, and Mail settings between iCal, Address Book, Mail and third-party applications that utilize SyncServices with OS X Lion and earlier
2) Contacts, Calendars, and Mail settings with Calendars, Contacts, Mail, and third-party applications that support SyncServices <== Notes syncing is implied gone under Mountain Lion.
Possible future return of SyncServices
3) Possible return of SyncServices (not a given yet): If it happens, could it be only Contacts and Calendars supported?