I have to agree, mostly while solo they're a pain sometimes and I have WSs that simply don't get used.

I'd be far more interested in seeing party strategies in combos, a lancers true thrust could open the way for the side attacks from any other job which in turn could open the way for any other jobs rear attacks, Or a gla could "fast blade" and someone could follow w/ a side/read attack.
Perhaps these could cause the same effect as in a solo combo, just more potent in some way, or maybe they cause additional effects: confusion(the mob attacks friend/foe randomly for 15secs), off-balance(lowers def/eva), ..., . Add in some resistance down effects that only activate when using a team combo and not when solo'd to give us a reason to try to coordinate our attacks instead of the current "yeah I'm in a party, but I'm really just doing my thing over here, the other party members actions mean squat to me" battle mechanics.

You lose nothing in solo play, can still pt w/o using team based strategies, but if you choose to incorporate team strategies there's added benefits; A reward for working well w/ others if you will.