Prett good promo imo. That's the thing with Taker he's not going to blow you away with great mic skills, but his promo's are effective and too the point. He doesn't drag them out, gets the point of what he's saying across, and they are usually a little scary haha.
To answer your question though, no I don't think he should talk more. I don't think it would take away from his character, but a couple good promo's a year is much more effective than a lot of average ones and a good one now and then. That's what's so cool about Taker though, he can carry on great feuds without bringing the house down with promos. That's not his thing and I think if he just comes out and does what he did tonight a couple times a year then it's good.