I'm not sure exactly what the changes are (though rumours were abound), but if you're lucky you'll get some civil engineering in there (the dean was pushing for it last year) as otherwise, third year Civil becomes torturous.
First year will probably still have things that you've been taught before, most first years bring everybody up to speed and the same level as different students will have been taught different courses and to differing degrees.
Advice? First year isn't (wasn't) too difficult, take advantage of that to enjoy your time at Warwick, but keep in mind that its useful to know that stuff as the concepts underpin and feed into your other years...