Parties in the Federation:
Multiethnic parties
#Social Democratic Party of Bosnia and Herzegovina - SDP HiP is the successor to the old Communist party and a multiethnic, secular Social Democratic party in favour of a united Bosnia. Has 8 seats in the House. It is countrywide and also has a few seats in the Srpska National Assembly.
Democratic Front - DF is a Socialist/Social Democratic, multiethnic and secular party started in 2012 by the Croat member of the Presidency Željko Komšić as a breakaway from SDP in protest against that they accepted the right wingers in HDZ joining the government. Komšić is an outsider in Bosnian Croatic politics and was elected mainly on Bosniak votes, so he is seen as an illegitimate representative for the Croats by many Croats (and Serbs). No seats in the House.
#People's Party for Work and Betterment - NSRzB is a small Social Liberal, secular and multiethnic (but mainly Croat) party with 1 seat in the House.
Democratic People's Union - DNZ is a strange mix of economic Libertarianism, euro-scepticism, homophobia and local patriotism founded in 1993 by oligarch and war criminal Fikret Abdić, who led the small Velika Kladuša enclave in NW Bosnia during the war and collaborated with the Serbs. It is Bosniak-Croatian bi-ethnic and committed to regional autonomy for Velika Kladuša. Abdić was in jail 2002-12 for war crimes and is no longer leader of the party. It has 1 seat in the House.
Of course multi-ethnic is a bit of a misnomer. The SDP, for example receives nearly all of its votes from Bosniaks. On that note, will the Croats' representative again be elected by the Bosniaks for them?
Why would reforms be more needed in Republika Srpska? Unlike the Federation, it isn't divided into cantons to further complicate governing and their citizens seem to be more satisfied than those of the Federation, considering their low participation in the demonstrations at the beginning of the year.