This is a question that I don't think can be answered. For one thing, there's no pictures to show what your base currently looks like. Secondly, there's a few things that aren't clear in your statement. Are you having problems because the purpur and endstone don't mesh well with farm designs - and you can't hide or cover up your farms? Is your base not big enough? Can your current design be adjusted to make vertical growth possible? Are you unhappy with the style because you're having trouble incorporating farms, or was it not your style to begin with?
If you're unhappy with the style of your base to begin with simply because 'it's not your style', then by all means change it. If you like the style but are having trouble incorporating farms into it - and dislike it because of that - then maybe some brainstorming with fellow Dogcrafters could help you transform it into something more manageable.