Hi,
We concocted some house rules for these a few years back.
We did them for most of the armies as well as characters for the armies.
I may even have the spreadsheet somewhere

I will address each unit in turn:
Lothern Seaguard - yours are too expensive, there are rules already published for them (in a warmaster mag) the stats are the same but only 75 points and I would limit the to 2 per 1000 points.
Same goes for swordmaster (published) stats are right only 1 per 1000 and they are fearless and 90 points.
Same goes for phoenix guard (published) stats are right only 1 per 1000 and they are disciplined and 90 points, no such thing as a ward save in this game.
White lions look ok, try not to make up new special rules though! Stick to the ones described in the battle honours article (hopefully soon to be available on this site, but it can be found elsewher). Min/max too high.
Shadow warriors, no such thing as skirmish in WM, but if you mean like empire skirmishers (I think you do) then they look fine.
You did forget lion chariots though

Lion Chariots
-Attacks: 4
-Hits: 3
-Armour: 5+
-Command:
-Unit Size: 3
-Pts per unit: 120
-Min/Max: -/2
-Special:
An important thing to remember (it took me ages to do this) is that this is not a straight port over of WHFB so even though alt models may be available there will probably never be any rules for them. But house rules are great, you could even run a tourney with amended army lists including these rare units.
Just my 2 penneth.
Mick