Something major seems to be overlooked here when it comes to guildleves reforms. Battle leves are severely unbalanced. I should not be able to initiate a rank 20 leve on five stars, complete the leve easily and then initiate the next on five stars only to die on the first mob.
The reason this happens is because the rank of the mobs is unbalanced. Some can be as high as 37 while some can be in the high 20s. A rank 37 mob is extremely tough to someone in the low to mid 20s.
There should not be major rank differences in the mobs in each leve. This will be an even bigger issue when the battle system changes so that a mob of your own rank is challenging. A simple system would be as follows:
Rank 20 leve mobs (all 20 leves):
1 star - rank 30 mobs
2 star - rank 32 mobs
3 star - rank 34 mobs
4 star - rank 36 mobs
5 star - rank 38 mobs
Ideally you would up their stars every other rank and when you hit rank 30 you start doing rank 30 leves with the same system. Of course when the battle system changes so that your ideal mob is one of your own rank you'd have to lower the leve mob ranks accordingly but a gap of two per star would still be great.
Consistency is key.
I don't care what the rank of the mobs is decided on but each leve should be consistent. I should know what rank my mobs will be when I start the leve and choose the stars. In fact put the mob rank in brackets next to the stars to help new players who haven't memorised it all too.
I'd also like to see the unbalanced situation of local leves changed. There's way too many rank 1 and rank 5 leves and not enough 40, 45 and 50s. I know this is being changed at some point but it can't come fast enough. Guessing that will have to come after the recipe changes to ease the workload.