The issue is unfortunatelly not that simple.
first of all its dificult to judge lawtia cards normal performance cause currently refess is very much in. Lebeau is a very good speedy unit with decent dmg output. If falkow is out of agi control speedy units are a huge issue and gowen has to take the hit.
Mage knight is still one of the better WK cards.
and "TOP RP file" is not a really good mesurement cause top rp is very much depending on the current decks played (which never covers the full spectrum).
about certain "buffs" lawtia has really no issues with its lvl2s. Falkows lvl2 mainly need more units that support the theme and likely motivate players to actually play a lvl2 rush (note also ex wizard archer is a rare card).
About the lvl3s again its difficult.
falkows are usually about 40 (more standalone) to 50 (field oriented) hp. their dmg output is weak without complete field support or sp advantage. but you can solve this aslong you win the sp game. There are also some dmg specialists in wk but they are rarely used. Loosing to gowen is standard. But if the tankiness of in other spheres keeps increasing we need to thing about the attack.
same with lawtia: lawtia has sp drain, thus similar to falkow lawtia should be forced to go for field with its lvl3s (here due to tankiness issues). And there I am slightly tending to question the tankiness that sometimes is present in lawtia. But again, those cases appear when the deck is field oriented.
But I give credit, with the increasing hp/defense power some of the field oriented units concept should be overthought. I am just not sure if we really need buffs and not just new units.
Honestly where i rather see the real issues appearing is at the lvl4s of these spheres. Maybe i open a thread for this