There are a couple of misaligned parentheses and a missing curly brace.
This seems to be working for me syntax-wise

Get-VMHost -PipelineVariable esx |
ForEach-Object -Process {
        $sLog = @{
            loghost = 'tcp://server.com:1514'
        }
        $esxcli = Get-EsxCli -VMHost $esx -V2
        $old = $esxcli.system.syslog.config.get.Invoke()
        $old2 = $esxcli.network.firewall.ruleset.list.Invoke(@{rulesetid = 'syslog' }) 
        if ($esxcli.system.syslog.config.set.Invoke($sLog)) {
            $esxcli.system.syslog.reload.invoke($sLog)
            if ($esxcli.network.firewall.ruleset.set.Invoke(@{rulesetid = 'syslog'; enabled = $true })){
                $esxcli.network.firewall.refresh.Invoke(@{rulesetid = 'syslog'; enabled = $true })
                New-Object -TypeName PSObject -Property ([ordered]@{
                        vCenter            = ([uri]$esx.ExtensionData.Client.ServiceUrl).Host
                        VMHost             = $esx.Name
                        SyslogOld          = $old.RemoteHost
                        SyslogNew          = $esxcli.system.syslog.config.get.Invoke().RemoteHost
                        FirewallRulesetNew = $esxcli.network.firewall.ruleset.list.Invoke(@{rulesetid = 'syslog' }).RemoteHost
                    })
            }
        }
    else {
        Write-Error "Syslog configuration failed on $($esx.Name)"
    }
 } | Export-Csv -Path "c:\file.csv" -NoTypeInformation -UseCulture