SQL 2012 :: Locking Behavior On Indexed Views

I have a question regarding the locking behavior of indexed views. We have a 3rd party application and something like the following table:

CREATE TABLE [Person].[Person](
[BusinessEntityID] int NOT NULL,
[FirstName] varchar(20) NOT NULL,
[MiddleName] varchar(20) NULL,

[code]....

Also the 3rd party application uses an indexed view, which is based on the following query and has the same structure as the base table:

SELECT [BusinessEntityID],
[FirstName],
[MiddleName],
[LastName],
SUM([Quantity]) AS [SUMQuantity]
FROM [Person].[Person]
GROUP BY [BusinessEntityID], [FirstName], [MiddleName], [LastName]

The result is, that the indexed view has nearly the same data / entries as the base table. The indexed view is often queried like this:

SELECT SUM(SUMQuantity) FROM [vPerson] WITH(UPDLOCK, NOEXPAND) WHERE [BusinessEntityID] = 45 AND [FirstName] = 'test'

The base table is also queried very often with update locks (UPDLOCK). Because the indexed view is nearly just a copy of the base table and there is no performance gain (read), I would like to drop the indexed view. I'll then experience more locks / blocks, because now the queries are seperated on two objects.