Brianna:
You should only need to add a fairly small amount (<5% by weight) so the answer is ... it depends on the chocolate and the cocoa butter you are using. Unsweetened chocolate (like Guittard Oban) is fairly high in cocoa butter, so if you think you're diluting the flavor, cut down on the butter slightly and add some unsweetened chocolate to the blend. Alternatively, consider using an undeodorized cocoa butter which will have a pronounced chocolate flavor (compared with a deodorized butter).
As for the melt point - some butters have lower melt points than others. Butters with low melt points are considered "soft" and butters with higher melting points are considered "hard". If you add a low melt point butter to a chocolate it may affect the melt point of the blend, also depending on the amount of butter you're adding.
In the end, you'll need to do some experiments to see what works best for you.
Is this related to the enrobing question?
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clay - http://www.thechocolatelife.com/clay/