Simplify feature request ISSUE template

.github/ISSUE_TEMPLATE/feature-request.yml

@@ -1,31 +1,28 @@
 name: 🚀 Feature request
-description: Submit a proposal/request for a new llama-stack feature
+description: Request a new llama-stack feature
 
 body:
 - type: textarea
   id: feature-pitch
   attributes:
-    label: 🚀 The feature, motivation and pitch
+    label: 🚀 Describe the new functionality needed
     description: >
-      A clear and concise description of the feature proposal. Please outline the motivation for the proposal. Is your feature request related to a specific problem? e.g., *"I'm working on X and would like Y to be possible"*. If this is related to another GitHub issue, please link here too.
+      A clear and concise description of _what_ needs to be built.
   validations:
     required: true
 
 - type: textarea
-  id: alternatives
+  id: feature-motivation
   attributes:
-    label: Alternatives
+    label: 💡 Why is this needed? What if we don't build it?
     description: >
-      A description of any alternative solutions or features you've considered, if any.
+      A clear and concise description of _why_ this functionality is needed.
+  validations:
+    required: true
 
 - type: textarea
-  id: additional-context
+  id: other-thoughts
   attributes:
-    label: Additional context
+    label: Other thoughts
     description: >
-      Add any other context or screenshots about the feature request.
-
-- type: markdown
-  attributes:
-    value: >
-      Thanks for contributing 🎉!
+      Any thoughts about how this may result in complexity in the codebase, or other trade-offs.