I think this is an interesting idea. If you are going to support the use case of polling bakers for their sentiment, you should also consider the use case of polling delegates for their sentiment and current baker.
As a delegate I would love the ability to tell a polling platform how I feel about a potential proposal (or features within a proposal) and also tell that platform my baker. Doing this would allow bakers to judge the sentiment of their delegates easily, and let them know how much delegated Tez they could lose if they vote against the wishes of their delegates.
