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Shadow Clones are important in Itachi's arsenal. With the use of these "teleporting to Itachi and absorbing him" becomes much more difficult than mentioned. If their are 2 clones of Itachi and the Orignal Itachi roaming the area the chance of the Orignal Itachi being noticed is low. Now with the use of these clones Itachi can stay on offense while shrouding his existence. Absorbing a clone of Itachi would cause far more problems for Obito than known. Shadow clones are known to give their experience's directly to the User[
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]. If a Clone is absorbed the experience of being absorbed and being in the other Dimension would now be apart of his intelligence. This would give Itachi an estimate of how long it takes Obito to absorb him and what the other Dimension is like. If a Clone is stuck within the Kamui Dimension Itachi and his clone would easily simulate the Scenario with Kakashi and Naruto[
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]. This would make it so that every time Obito attempts to be intangible by sending parts of his body to the Kamui Dimension the Clone would Assault. Itachi would also have the option of causing damage to Obito as soon as he Absorbs a Clone using his Clone Explosion Technique[
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]. During the absorbtion of a clone Itachi would Simulate again another Scenario. Instead this would be the Scenario with Konan[
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]. As she was being absorbed she exploded[
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]. These are the damages from the explosion even though Obito absorbed most of the Technique[
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]. Both weakness of Kamui would be exploited through the use of Shadow Clones while still masking Itachi's presence. Being Tangible during absorption and being intangible would both be exploited. To add on to Obito's dangers is Genjutsu.