Interestingly, I've recently heard about push back on theology textbooks being used here and there in the Wesleyan Church from more than one part of the church. What people don't realize is that there just isn't a great Wesleyan theology book out there right now. I suppose Tom Oden's Classic Christianity is pretty good, but it's written from a "common Christianity" standpoint and is boring as a fish to me.
Migliore's Faith Seeking Understanding is one of the best written, but is mainstream, so annoys Wesleyans who want to agree with everything they read in a theology book. Theology books from the Nazarenes like Greathouse and Dunning's probably come the closest to a Wesleyan theology, but they write in a way that can alarm conservative Wesleyans. They probably don't mean it but their "red flag" language at points can come off as in your face. Wiley, as one person said to me recently, is so old it's more of a historical artifact than a real option.
I think it is a sign of theological sickness in the Wesleyan church that a lot of Wesleyans would probably prefer to use a Calvinist theology like Grudem over the Nazarene one by Greathouse. For example, if I were to write a Wesleyan theology, I have no doubt I would be attacked for it, even if I wrote it in an irenic way. To me that reflects how much fundamentalism continues to lurk in our church.