You can already use MethodView with Blueprint with bp.add_url_rule(), which corresponds to app.add_url_rule(). This also obscures the behavior of as_view(), which is important for View classes. If we add this I want the docs to be clear that route is a shortcut that doesn't pass class arguments and sets the endpoint name to the class name.

Also, this should probably apply to add_url_rule and route on both Flask and Blueprint, for any View subclass, not just MethodView.

Going to close this due to lack of response. I'm open to merging this in the future, but it needs improvement.

Sorry for the delay.

I want the docs to be clear that route is a shortcut that doesn't pass class arguments and sets the endpoint name to the class name.

I've added a blurb for this to the docs. Let me know if you're happy with it. I also added a second example for Blueprints+MethodViews.

apply to add_url_rule and route on both Flask and Blueprint, for any View subclass, not just MethodView

Can you elaborate on this? My naive interpretation is just:

diff --git a/src/flask/blueprints.py b/src/flask/blueprints.py
index 0e974ab2..13392174 100644
--- a/src/flask/blueprints.py
+++ b/src/flask/blueprints.py
@@ -14,6 +14,7 @@ from functools import update_wrapper
 from .helpers import _endpoint_from_view_func
 from .helpers import _PackageBoundObject
 from .views import MethodViewType
+from .views import View

 # a singleton sentinel value for parameter defaults
 _sentinel = object()
@@ -283,7 +284,7 @@ class Blueprint(_PackageBoundObject):
             endpoint = options.pop("endpoint", f.__name__)

             # Support decorating MethodView classes. See Issue #3404
-            if isinstance(f, MethodViewType):
+            if isinstance(f, (View, MethodViewType)):
                 f = f.as_view(endpoint)

             self.add_url_rule(rule, endpoint, f, **options)

Is that what you're talking about or am I completely misunderstanding?

Oh, and you can see the changes in https://github.com/dougthor42/flask/tree/blueprints-and-methodviews. I thought that GH would continue to update the MR even after it's closed, but I thought wrong.