My biggest problem I have with most of the laguz is there growth rates. Most level ups outside of BEXP result in only 1 or 2 stats increasing, and for any character this usually a bad sign (this is almost always HP and luck). Looking at the level up percentages, the only laguz that have good growth rates are Januf and Ulki (its too bad they suck compared to Naesella and Tibarn). Looking at the lists, most of the tiger laguz will not level their strength enough to make a big difference.
My other complaint with the non-royal laguz is there weapon, it takes forever to get them to level up their strikes skill level, but even when you get their skill level to SS (which is nearly impossible because most good laguz OHKO), their strike is still worse than the Great variant of the same attack.
Also agreeing with Khuutra, laguz max out at level 40, this means there are 20 level ups that they are missing (potential stat growth chances). Now this even agrees with my first point, where most of the laguz have worse stat growths than several beorc, so the stat discrepancy of the lower leveled laguz really shines through if you take the time to level them up. The only way around this is by using BEXP, but that generally will cause characters weak in speed, attack, defense (depending how BEXP level ups go).







