The GOP would be absolutely retarded to end the filibuster.
If Dems win the midterms (which is the likely outcome according to history) they’d absolutely also make use of this for permanent structural changes (think Puerto Rico statehood, extending the Supreme Court).
Once the filibuster is abolished, it will never come back. No way this is in the long term interest of Republicans.
If Trump gets the them to do this, it would show he has absolute power over the GOP. Would be scary.