For entrance into the Champions League your clubs personal coefficents dont matter, they are just too judge if you are seeded or not, or which pot you go into in the group stage, obviously higher you are the better pot you are and easier group you can potentially get.
What your looking for is the Nation coefficients (see world> Nations> then either Nations Coefficients or Qualification Places) this shows you where your country is ranked in terms of european prowess, in coefficients it will show you how far you are off certain countries above you and in the Qual Places it shows you what Rank your country needs too be too start off at later stages, for example too start in the 3rd qual round your country has too be in the top 15, this also would mean you get 2 champ league places for Croatia.
This is the point where you start seeing how your croatia contemparies are doing in the EL and hoping they do well and cursing Celtic for weakening Hajduk as that means they will not do as well in EL hence harming Croatian progress on the european stage.
Hope that helps out a lil bit on why you still have keep starting in 2nd Qual Round even after a couple great seasons in CL and if any of it needs a bit more clarifying just ask