Leading up to Wrestle mania, there was plenty of long term storylines. Triple H vs Rollins, Orton vs Wyatt, Owens vs Jericho, Goldberg vs Lesner were all spread out long term storylines that were months in the making.
After Wrestle mania, there hasn't been hardly any long term storylines leading up to Summerslam. I can't really judge though because since we live in an age of people with much short attention spans, it makes sense for WWE to focus on just creating "big moments" because it's more of an instant gratification.
Alot of people, including myself get bored with these long term storylines that WWE is trying to do right now because there's not much substance in them. Dean Ambrose vs The Miz or Seth Rollins vs Samoa Joe are good examples. These feuds just become so boring and I want to see them do something else