[sirinsidiator]

Just tried it and it really only returns data for the currently visible ability:

local function PrintAbilityInfo(abilityId)
        local name = GetAbilityName(abilityId)
        local icon = GetAbilityIcon(abilityId)
        local hasProgression, progressionIndex, lastRankXp, nextRankXp, currentXp, atMorph = GetAbilityProgressionXPInfoFromAbilityId(abilityId)
        if(hasProgression and nextRankXp > 0) then -- not maxed
            local rank = GetAbilityProgressionRankFromAbilityId(abilityId)
            local percent = currentXp / nextRankXp * 100
            df("%d: %s |t100%%:100%%:%s|t: %d (%.2f%%)", abilityId, name, icon, rank, percent)
            return GetAbilityProgressionAbilityId(progressionIndex, 1, 1), GetAbilityProgressionAbilityId(progressionIndex, 2, 1)
        end
    end
 
    for i = 1, GetNumAbilities() do
        local morphA, morphB = PrintAbilityInfo(GetAbilityIdByIndex(i))
        if(morphA) then PrintAbilityInfo(morphA) end
        if(morphB) then PrintAbilityInfo(morphB) end
    end