There are people that are excited that you can build a hammerdin D2 style. It’s not a bad thing and you don’t need to bother either. Because you can build a different way. You can throw hammers in a cone, in a nova, throw hammers that chain to enemies, you can have hammer have a void damage aura.
You can build fireball throwing balls in a cone or throw them in a line. With pierce and homing you can generate fireworms that spread all over the screen, chasing enemies.
You can have the lighting chain to enemies (pretty standard). But you can also have the lightning not spread, but chain to the same target repeatedly. You can also convert the blast into ice and channel that skill.
With the skeleton mages you can have them throw fireballs or ice bolts or necrotic projectiles (in a cone, you single one like a machine gun) or turn them into dual sword wielding death knights. You can make the mages sacrifice your warriors and or wraiths. You can choose to have several mages or 1 big Archmage.
With Skeletons you can choose to have Rogues, archers or warriors.
And for sentinel in general there are so many different build possibilities (you can even go a staff wielding caster route). You can do melee, range, hit or ailment builds.
Just because you haven’t discovered all the possibilities the game has to offer, doesn’t mean it isn’t there.
I’d suggest you just try out different things or look into
if you need some inspiration.