Honestly, I'm expecting to like Episode VII a lot less than Episode I. So if it's on the same level or even a little better, I'd be pleasantly surprised.
And, while I loved
Pirates of the Caribbean (the first 3 anyway), I am worried that you're right that it could be similar in tone. Although a full length Star Wars movie focused on Jar Jar Binks would probably feel similar in tone to one of the Pirates movies.
Thankfully there's no solo Jar Jar film. (Their might be a "Solo/Jar Jar" film but that would probably be digging deep into the world of XXX parodies.)