The luci-app-3ginfo-lite does not look like arch dependent - are you referring to packages like sms-tool which needs to be compiled?
As for compiling taking ages: are you compiling on the device itself instead of cross-compiling?
Maybe LuCI APP: luci-app-3ginfo - 3ginfo gui (Info about 3G/LTE connection) has better answers to your inquiry and otherwise you might continue your quest in this thread from the package maintainer..