I believe that the Systematic and Narrative approaches to theology have complimented one another almost innately in Pentecostalism. It is important for Pentecostals to build their foundation in Scripture, which of course requires more Academic-leaning activities such as Bible studies. We need to know the Word in context, not only to build fellowship with God or build our Spiritual armor, but also to know the truth of what we believe and what we preach. The Narrative approach, the emphasis that we place on testimony and on experience, is what keeps us from falling into legalism.
I believe that the emphasis on the Narrative approach is part of why Pentecostalism is so appealing to those who may have a dated or even a traumatic view of church, or religion in general. It makes Christianity relatable and allows the congregation to experience a tangible relationship with God. It's dynamic and emotional, and I think that that is a part of people's lives that is often underrepresented in their day to day reality. To me, this is a wise choice. Not only does it touch on the Biblically sound way to worship and engage with the Lord, it also allows for diversity and heartfelt participation within the church. People are encouraged to grow in their relationship with Christ, not just follow rules for the sake of it.