Mhes, I disagree with your second reason, I don't think adsense looks to much like adsense. I feel the new ad format that was recently rolled out is bang on with IMO the exception of the blue button with white arrow, but saying that I also feel that it is a good thing that changes to the ads are made frequently and this has been done so my opinion of the button could well be wrong and my CTR is holding ground of 4-5%, but IMO not from the new arrow but from the new add format which I feel was brilliantly designed. I feel if the button was ditched with the new ad format then CTR could in fact be increased, but saying that it could then be classed as possible invalid clicks so maybe Google do know best with the strategy and giving advertisers higher returns with conversion rates.
We all have to work hard and think hard about the whole picture, advertisers are not going to advertise if they don't get some kind of conversion rate. I feel my input on my sites have complimented Adsense with conversion rates and feel that my tactics are being rewarded by earnings. Although my sites are not MFA I also feel I push MFA just under the limit of being considered acceptable by Google, but the conversion rate does the talking, so advertising customers, google and myself have a good relationship with my sites setup. I could actually push my earnings so high where I could leave my day job, but refuse to give my destiny in the hands of Google, it wouldn't be so bad if publishers had a verbal or email warning and google said why and what particular reason, but we all know that google just cut the account and appeals are pointless, I am certainly not putting myself into that position or leaving my day job of which I consider my bosses reasonable people.