I still do not see these as issues, we are constrained to a 1140px grid (which is actually good considering the fact that most sites and themes use a 960px grid). May be slight improvement here and there but overall I do not see a problem. One example is that you may want to move the menu to the right like this –
#primary-menu {
float: right;
}
As far as slider is concerned, you can use the admin panel for the revolution slider to place the text wherever you want. I am sorry if I still miss something here – things at least look similar to the preview site.