Sort of relevant to this thread as it is an old Express Motors service....
Express Motors used to run the 1B between Porthmadog and Blaenau Ffestiniog as a through service with the 1/1A between Porthmadog and Caernarfon making it possible to run an hourly service. When they folded the 1B was taken on by Arriva on a stand-alone one bus schedule, running every hour and a bit with breaks, most unsatisfactory. Given their local base is in Pwllheli the obvious thing to do would have been to tag the 1B onto the existing half hourly service 3 in which event an hourly service could be provided. Presumably this was seen as too difficult given the short notice on Express's demise. The other problem is that the service 3 is run jointly with Caelloi, Arriva providing two buses and Caelloi one. With this extension Caelloi would have to run to Blaenau every four hours.
Gwynedd's website now shows that, from 13 May, Arriva plan to do exactly that, but all themselves. Arriva, with 4 buses, now plan to run the 3/3B departing Pwllheli at 00 and 30 (currently 15 and 45) with alternate journeys as 3B through to Blaenau. Caelloi's existing journeys every 90 minutes between Pwllheli and Porthmadog continue at current times. I don't know what the politics and commercials of this are - maybe it is illegal for them to discuss a change to the joint operation, maybe they just couldn't agree, maybe Arriva are being competitive. This is a good change as it adds 5 more journeys to the Blaenau leg but seems hard on Caelloi. I used the 3 once a few years ago, I was on the Caelloi bus which was a proper Scania saloon, Arriva had one Cadet and one no-show with the Cadet running so late the Caelloi bus almost caught it up!
Other changes - with the withdrawal of Arriva's 1X-X1 between Llandudno and Blaenau Ffestiniog the Llew Jones X19 has been improved slightly. Also the Arriva 82/3, 85/6 and 88 have had small improvements compared with the original times especially eliminating a gap between 14.50 and 17.40 in departures from Caernarfon to Llanberis on the 88 and some later journeys.