Hi,
I tested your website in IE9 and icons are showing up (check screenshot).
Regarding slider text, it seems that some styles are missing (but only on IE9) so try adding styles below to Elvyre options->Appearance->Custom CSS:
.tp-caption.largewhitebg, .largewhitebg {
font-size: 50px;
line-height: 70px;
font-weight: 600;
font-family: "Open Sans";
color: rgb(0,0,0);
text-decoration: none;
padding: 0px 20px;
text-shadow: none;
background-color: rgba(255,255,255,0.74902);
border-radius: 8px 8px 8px 8px;
border-width: 0px;
border-color: rgb(0,0,0);
border-style: none;
}Try css below for portfolio items share icons:
.portfolio-item-like > .ssba a{
width: 35px;
}Regarding page speed. If you are not satisfied with speed you can install Caching plugins to reduce number of requests and page size. Read more about it on links below:
http://www.wpexplorer.com/decrease-wordpress-page-load/
http://www.elegantthemes.com/blog/resources/the-best-wordpress-cache-plugins-and-how-to-use-them
Vladimir
