been testing the hybrid control powers... maybe a small chart is in the works. (no % testing). came up with some different findings than you posted.
tested on lvl 50 enemies CoT in PI Portal Corp. parking lot.
control radial embodiment: chance to mez.... the stun does not trigger at all (0%) after the immobilize and terrorize both trigger in pve, the "control" message may or may not appear on the screen, when it does appear, think that enemies are being stunned at a greater magnitude.... but one cannot tell in game because there is no indicator other than the "control" message. this may be additive stacking based on how many applications of the control were cast on the enemy. (not exactly sure how this works).
control core embodiment: +1 mag must need a tohit check, but definitely is being triggered. waylay only mainly only triggers on minions and but can, though very very infrequently trigger on LTs.
the status protection figures in-game combat attributes say that both core and radial embodiment offer 28.57% status protection, not 40% as seen in the chart above.. not sure if a game attribute issue or just a description issue.
would use core embodiment is if you are concerned with damage. (personally would skip this hybrid altogether, was hoping it was better than is).
but caution: core works well, but i need more testing to determine if it is also stifling my procs in 'world of confusion.' with more testing it seems to me that the proc i have in 'world of confusion' will not trigger when either the hybrid core and/or radial is toggled on.