I just took BA from MIA/RIX via LHR the 3rd week in July. and I have to admit, the connection via LHR is much more difficult than the old one through LGW. The change of terminals, etc is a real hassell.
I understand LatviaCalling viewpoint re: flights to Spain, etc., however I do appreciate the mid morning departures out of RIX. The 0745 departure tends to turn your last night in Latvia into an all nighter...