Text search in Terminator does not highlight matching patterns when found. It just shows the row containing one of the matching patterns at the top of the terminal. This way text search is still usable, but not the best.
UPDATE: It will probably be ported soon (I think they might do it by Plasma 5.6). Yakuake still has not been ported to KFrameworks and as such pulls KDE4 runtime dependencies with it. This might become a problem when KDE4 is dropped from Linux distributions (e. g. Arch Linux).
Guake's appearance is very customizable. From the transparency to the width and height of the window. You can also choose what interpreter to use (bash is the default) and also things like which key to choose for toggling the terminal window.