1. Many players new to MCME will expect to see the epic movie version of Barad-dûr. It is indeed one of the most iconic images people have about LotR. Thus they would be disappointed not to see this.
2. The Eye of Barad-dûr is described in the Book quite different as a flame stabbing from a great window in the highest tower of Barad-dûr:

J.R.R. Tolkien (Letter No 245) said:

The situation as between Frodo with the Ring and the Eight [The Witch-king had been reduced to impotence] might be compared to that of a small brave man armed with a devastating weapon, faced by eight savage warriors of great strength and agility armed with poisoned blades. The man’s weakness was that he did not know how to use his weapon yet; and he was by temperament and training averse to violence. Their weakness that the man’s weapon was a thing that filled them with fear as an object of terror in their religious cult, by which they had been conditioned to treat one who wielded it with servility. I think they would have shown ‘servility’. They would have greeted Frodo as ‘Lord’. With fair speeches they would have induced him to leave the Sammath Naur – for instance ‘to look upon his new kingdom, and behold afar with his new sight the abode of power that he must now claim and turn to his own purposes’. Once outside the chamber while he was gazing some of them would have destroyed the entrance. Frodo would by then probably have been already too enmeshed in great plans of reformed rule – like but far greater and wider than the vision that tempted Sam (III 177) – to heed this. But if he still preserved some sanity and partly understood the significance of it, so that he refused now to go with them to Barad-dûr, they would simply have waited. Until Sauron himself came. In any case a confrontation of Frodo and Sauron would soon have taken place, if the Ring was intact. Its result was inevitable. Frodo would have been utterly overthrown: crushed to dust, or preserved in torment as a gibbering slave. Sauron would not have feared the Ring! It was his own and under his will. Even from afar he had an effect upon it, to make it work for its return to himself. In his actual presence none but very few of equal stature could have hoped to withhold it from him. Of ‘mortals’ no one, not even Aragorn. In the contest with the Palantír Aragorn was the rightful owner. Also the contest took place at a distance, and in a tale which allows the incarnation of great spirits in a physical and destructible form their power must be far greater when actually physically present. Sauron should be thought of as very terrible. The form that he took was that of a man of more than human stature, but not gigantic. In his earlier incarnation he was able to veil his power (as Gandalf did) and could appear as a commanding figure of great strength of body and supremely royal demeanour and countenance.

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