It's exactly as many syllables as "ebola" but carries more information, what's not to like?
Indeed, it carries MUCH more precision than just "Ebola", which can mean any of the following:
"Ebola River" is a tributary to the Congo River.
"Ebola Hemorrhagic Fever" was the name of a disease first discovered in people living in the remote Ebola River watershed.
"Ebola Virus" (abbrev. "EBOV") is the infectious agent that causes "Ebola Hemorrhagic Fever"
"Ebolavirus" is the taxonomic genus to which the "Ebola virus" belongs.
"Ebola Virus Disease (abbrev. "EVD") is now the more common name for Ebola Hemorrhagic Fever. We can call it that because we have definitively identified the infectious agent that causes the disease (EBOV). Changing the name pre-emptively differentiates EVD from other hemorrhagic diseases that might arise from the same area.
Laymen simply say "Ebola" and let their audience sort out what they mean -- if indeed they mean anything precisely. I once had this conversation with an elderly relative.
Relative: 90% of bats have rabies.
Me: That's hard to believe.
Relative: It's true! I read it in the paper.
So I went to the paper and found out that she had it hopelessly garbled. TEN percent of bats SUBMITTED FOR TESTING had positive SCREENING tests.