It seems like you are approaching the summoner the way one should 'deliberately not optimizing it'. Your problem is the lycanthropy, which when you can control it is stupid powerful for just about any character thats not like a wizard. A master summoner is already really good, even if you dont optimize, so I'd say if you want to keep the character, and you want to keep the flavor, and the role of front liner, retrain(and i mean just get your gm to approve changing your class levels) the character from summoner to the wolf shifter (just change it to tiger instead of wolf) from wayfinder #5 (available for free download). Its basically a barbarian rethemed and altered slightly to make rage the shifting into wolf form.
Ditch lycanthropy and take that as your class instead of summoner. Then you have a solid frontliner, you keep the events that have happened to the character in tact, and it wont be overpowered compared to everyone else. Obviously this is a complete rebuild of the character but your dm should be willing if its causing problems. You can even say the feral influence of the lycanthropy is preventing your use of your magic or something to explain the sudden lack of summoning.