my suggestion is that you look into adjusting your valves. I had a similar problem with the acceleration and the smoke, and I went ahead and adjusted my valves, and the car runs like a champ ever since.
Only problem is that you will need the special valve adjustment wrenches, and a feeler gauge(if you cannot find a metric gauge that is okay, I did my valves with a standard gauge)
besides that you could try to run some Diesel Purge through your engine, and that might clean whatever gunk you still have left in your engine after all the filter replacement
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1981 240D/297K/4-spd/OM617 (mine)
1982 240D/241K/4-spd (wife's)
1979 240D/291K/4-spd/OM617 (father-in-law's)
1983 300DT/240K/4-spd (brother-in-law's)
1985 300DT/???K/5-spd Intercooler conversion (brother-in-law's)
1985 280TE/160K/5-spd (father-in-law's)
1963 UNIMOG (brother-in-law's)