He was harshly criticized for leaving 7th fleet and Taffy 3 alone and not returning to them once they called for aid in fact the Navy even called Halsey taking Task force 34 up north "Bull's Run". So he was criticized for his actions but is it fully warranted?
From hindsight it is easy but put yourself in Halsey's position, you are dealing with two fleets, the Central and Northern fleets to your knowledge the Japanese central fleet was defeated in detail and that the biggest threat is the Northern fleet because they have not engaged and have aircraft carriers. So of course you are going to send your best to defeat the biggest threat, should he have left behind some of the ships he took with him, yes but again he believed that the Central Force was in full scale retreat
All in all nothing but the highest praise can be given to Taffy three and Admiral Clifton Spargue and the brave Captains and sailors on board the tin cans and jeep carriers. They were tough as nails in fact combined with their fierce resistance and the Carrier escort planes attacking the central fleet made Japanese Admiral Takeo Kurita believe that Halsey had returned and ordered his fleet to regroup in the north.
You're tearing me apart- Tommy Wiseau