Kind of, but the two you mention as definite misses are absolutely huge. Allahyar and Tetteh both work incredibly hard up and down the wings, which worked well with Oscar because he also worked hard and the three of them were really putting pressure on opposition players with their closing down and dynamism. Now that two of those three are missing, the replacements aren't stepping up. It's no surprise that since those two got injured, our attack has withered and Oscar is now barely scoring at all, looking isolated and feeding off scraps. Those three are higher level players, players who could play in the Premier League. Other teams might have the odd big player missing, but to a team like us, their absence is felt so much more because they were the crux of our attacking play. Getting them fit will be paramount to our success.
Traore would make a difference through the middle, but it's hard to say with him being out for so long whether he would have had an impact or not.
If I was Allahyar, I'd give the WC a miss and focus on getting fit. He's only 21, he's effectively got at least three other world cups he could play in if he keeps playing well at a good level and he isn't going to get picked if he isn't fit and playing. Has to think long term here, which is difficult at a young age.