When you look at Keanu Reeves' career, he's actually done a lot of really good work--the best of it when he's playing 'character parts.' But of course since he looks the way he does, he keeps getting cast in romantic leads--which, imho, he's fine at.
He was not, however, in the same acting league as Anthony Hopkins, Gary Oldman, etc. And it showed.
But I thought both Harker and Mina in that film were putting on somewhat 'high brow' speech. Upward mobility in Victorian England and all that. My biggest complaint was that movie was so busy--the writer had written it as a cable miniseries to include as much of the original novel as possible (adding the whole love story, which does have a few tiny hints in the novel--albeit more like loopholes from which to explore something).
Count Dracula with Louis Jourdain took similar liberties, with making Dracula an urbane seducer when in the novel he's little more than slavic aristocratic rapist. It is, however, an excellent adaptation.
In 2006 Marc Warren and David Suchet starred in another BBC Dracula, one that took a completely different direction than other recent versions. It took extreme liberties (which I don't mind) including having Arthur the one who helps bring Dracula to England for tragic reasons of his own--and portraying the Count as a very byronic Beast.
But one of the best Draculas was also from the BBC, the 1968 adaptation with Denholm Elliot and Susan George. It is very, very difficult to find. I was lucky to get a copy, because it has never been officially released on either VHS or DVD. But while done on a tiny budget by our standards--and like the stageplay pretty much focusing entirely on events in England--it was the best of the three by far. This one also, while making the Count rather compelling and attractive, portrayed him as essentially an evil creature without hope of redemption (which of course was one of the things I loved about the Coppola film--in keeping with the novel, especially when Dracula is killed and Mina notes his face held an expression of peace such as she never imagined it ever could).