It would concern me as well.
With the original mounts there was zero load on the SA pivots (next to zero anyway)
The shock loads were countered by the lower subframe mounts and they look to have a load of about 1.25x the shock load.
Wit your new mono-shock mount you have greatly increased the leverage on the shock, and obviously also the forces, but this greatly increases the load on the SA pivot.
To my point
The slight downward angle helps out a bit in reducing the forces but you are probably now putting double the wheel load into the SA pivots.
You are also forcing the top end of the cradle forwards with double the wheel load but that is less of a concern here.