Update issue templates

.github/ISSUE_TEMPLATE/epic-request.md

@@ -8,13 +8,24 @@ assignees: ''
 ---
 
 **Problem**
-A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
-
-**Success Criteria**
-A clear and concise description of what you want to happen.
-
-**Sub Issues**
 - 
 
-**Additional context**
-Add any other context or screenshots about the epic request here.
+**Spec**
+- 
+
+**Designs**
+- 
+
+**In Scope**
+- 
+
+**Not in Scope**
+- 
+
+**Sub Issues**
+> Note: All issues need to share the same `milestone` as this epic
+- 
+
+**Related Milestones**
+- Past
+- Future