as you say "...if it ain't broke...." I really wouldn't go into the trouble of changing the rigging
unless you are the equivalent of the well-off US HAM that has quadruple stacked 180 feet antenna
towers and wants the perfect HF- station on a sailing boat
Rest assured, the "sloping end-fed alternate backstay wire antenna
well enough if you have an adequate RF-ground system and installed everything well (also the 12V DC power connections to your transceiver).
I can work Australia
, US, South America
on HAM frequencies with similar type of installation
from my sailing boat
Seawater is the near-perfect take-off platform.
And yes I plan to experiment
soon with a 7 meter vertical fibreglass fishing
pole at the transom as HF-antenna to see if there is any difference with the alternate backstay antenna. Using the same ATU. For fun.
Then again I like the fun of experimenting