Skeleton Axeman
This was the "sacrifice armor for speed" morph that was even highlighted in the Episode Zero comics. Well, no more. Skeleton is faster in every category (axeman may walk slightly faster when hasted, but it's within the margin of error, so I would just ignore it). Now, the only sacrifice armor for speed morph is Baphomet/Beleth morph which is largely inaccessible to the world.

Skeleton Archer
This morph has greatly improved. Now that you can wear your full armor set with it, it makes a nice bow morph. However, this bow morph is only for archers level 10-13, since at level 14 the orc scout morph is available and blows this one out of the water. Since most vets blow through levels 10-13 in a matter of hours, it's not really that useful unless you are new to Lineage.

Skeleton Soldier
We didn't have any info on skeleton soldier before, but it's now about the same as a skeleton with slower magic. You might say "but skeleton soldiers have range 2". Wrong, that's broken. I'm not sure there are any plans to fix it, but all "range 2" morphs can only hit 1 cell away.

Spartoi
Some of you may have noticed that everyone was in Spartoi morph for the Death Matches today. Well, they're the new bad boy in town. Previously, I would recommend werewolf to knights/princes, orc fighter/skeleton to mage and orc scout to archers. No more. I now recommend that all non-archers level 10-51 use spartoi morph. It's full AC, as fast or faster than skeleton/orc fighter/werewolf in walking, magic and hitting. ^^

Check out the Morph Guide to make your own conclusions.