Actually you can enable bootlogos and verbose boot. You have to only install OpeniBoot manually.
Please take in mind that Bootlace installs OpeniBoot by patching the kernel and the NOR. So your bootlogos and such will be removed. If we try to include the feature you requested, it would be virtually impossible to accomplish this.
However, after you jailbreak and put your custom bootlogos, you can keep them if you install OpeniBoot manually (guide on Wiki, depending on your preferred OS).